:: SIN_COS4 semantic presentation

begin

definition
let th be ( ( real ) ( V11() V12() real ) number ) ;
func tan th -> ( ( ) ( V11() V12() real ) Real) equals :: SIN_COS4:def 1
(sin th : ( ( V11() ) ( V11() ) set ) ) : ( ( ) ( ) set ) / (cos th : ( ( V11() ) ( V11() ) set ) ) : ( ( ) ( ) set ) : ( ( ) ( ) set ) ;
end;

definition
let th be ( ( real ) ( V11() V12() real ) number ) ;
func cot th -> ( ( ) ( V11() V12() real ) Real) equals :: SIN_COS4:def 2
(cos th : ( ( V11() ) ( V11() ) set ) ) : ( ( ) ( ) set ) / (sin th : ( ( V11() ) ( V11() ) set ) ) : ( ( ) ( ) set ) : ( ( ) ( ) set ) ;
end;

definition
let th be ( ( real ) ( V11() V12() real ) number ) ;
func cosec th -> ( ( ) ( V11() V12() real ) Real) equals :: SIN_COS4:def 3
1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / (sin th : ( ( V11() ) ( V11() ) set ) ) : ( ( ) ( ) set ) : ( ( ) ( ) set ) ;
end;

definition
let th be ( ( real ) ( V11() V12() real ) number ) ;
func sec th -> ( ( ) ( V11() V12() real ) Real) equals :: SIN_COS4:def 4
1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / (cos th : ( ( V11() ) ( V11() ) set ) ) : ( ( ) ( ) set ) : ( ( ) ( ) set ) ;
end;

theorem :: SIN_COS4:1
for th being ( ( real ) ( V11() V12() real ) number ) holds tan (- th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( V11() ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) = - (tan th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( V11() ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:2
for th being ( ( real ) ( V11() V12() real ) number ) holds cosec (- th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( V11() ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) = - (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / (sin th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( V11() ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:3
for th being ( ( real ) ( V11() V12() real ) number ) holds cot (- th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( V11() ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) = - (cot th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( V11() ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:4
for th being ( ( real ) ( V11() V12() real ) number ) holds (sin th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = 1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) - ((cos th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:5
for th being ( ( real ) ( V11() V12() real ) number ) holds (cos th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = 1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) - ((sin th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:6
for th being ( ( real ) ( V11() V12() real ) number ) st cos th : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
sin th : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) = (cos th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (tan th : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:7
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
tan (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) = ((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) + (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) / (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) - ((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:8
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
tan (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) = ((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) - (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) / (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) + ((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:9
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st sin th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & sin th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
cot (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) = (((cot th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) - 1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) / ((cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) + (cot th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:10
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st sin th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & sin th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
cot (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) = (((cot th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) + 1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) / ((cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) - (cot th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:11
for th1, th2, th3 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th3 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
sin ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * ((((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) + (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) + (tan th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) - (((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) * (tan th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:12
for th1, th2, th3 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th3 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
cos ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (((1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) - ((tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - ((tan th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - ((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:13
for th1, th2, th3 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th3 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
tan ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) = ((((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) + (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) + (tan th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) - (((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) * (tan th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / (((1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) - ((tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - ((tan th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - ((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:14
for th1, th2, th3 being ( ( real ) ( V11() V12() real ) number ) st sin th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & sin th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & sin th3 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
cot ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) = ((((((cot th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) * (cot th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) - (cot th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) - (cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) - (cot th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) / (((((cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (cot th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) + ((cot th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (cot th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + ((cot th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - 1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:15
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) * ((cos ((th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (sin ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:16
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) * ((cos ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (sin ((th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:17
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) * ((cos ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (cos ((th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:18
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = - (2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) * ((sin ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (sin ((th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( V11() ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:19
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
(tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) + (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( ) ( V11() V12() real ) set ) = (sin (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:20
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
(tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) - (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( ) ( V11() V12() real ) set ) = (sin (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:21
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & sin th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
(tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) + (cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( ) ( V11() V12() real ) set ) = (cos (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:22
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & sin th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
(tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) - (cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( ) ( V11() V12() real ) set ) = - ((cos (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( V11() ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:23
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st sin th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & sin th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
(cot th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) + (cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( ) ( V11() V12() real ) set ) = (sin (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:24
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st sin th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & sin th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
(cot th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) - (cot th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( ) ( V11() V12() real ) set ) = - ((sin (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( V11() ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:25
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (sin (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (sin (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) * ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:26
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (sin (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - (sin (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) * ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:27
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (cos (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (cos (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) * ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:28
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (cos (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - (cos (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = - (2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) * ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( V11() ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:29
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = - ((1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) * ((cos (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - (cos (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( V11() ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:30
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) * ((sin (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (sin (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:31
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) * ((sin (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - (sin (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:32
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) * ((cos (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (cos (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:33
for th1, th2, th3 being ( ( real ) ( V11() V12() real ) number ) holds ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / 4 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) * ((((sin ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (sin ((th2 : ( ( real ) ( V11() V12() real ) number ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (sin ((th3 : ( ( real ) ( V11() V12() real ) number ) + th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - (sin ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:34
for th1, th2, th3 being ( ( real ) ( V11() V12() real ) number ) holds ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / 4 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) * ((((- (cos ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( V11() ) ( V11() V12() real ) set ) + (cos ((th2 : ( ( real ) ( V11() V12() real ) number ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (cos ((th3 : ( ( real ) ( V11() V12() real ) number ) + th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - (cos ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:35
for th1, th2, th3 being ( ( real ) ( V11() V12() real ) number ) holds ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / 4 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) * ((((sin ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - (sin ((th2 : ( ( real ) ( V11() V12() real ) number ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (sin ((th3 : ( ( real ) ( V11() V12() real ) number ) + th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (sin ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:36
for th1, th2, th3 being ( ( real ) ( V11() V12() real ) number ) holds ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) / 4 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) * ((((cos ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (cos ((th2 : ( ( real ) ( V11() V12() real ) number ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (cos ((th3 : ( ( real ) ( V11() V12() real ) number ) + th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + (cos ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + th3 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:37
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (sin (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (sin (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - ((sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:38
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (sin (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (sin (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = ((cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:39
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (sin (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (cos (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) + ((sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:40
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (cos (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (sin (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - ((sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:41
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (cos (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (cos (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - ((sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:42
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds (cos (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) * (cos (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = ((cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) - ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) * (sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:43
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
(sin (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / (sin (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = ((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) + (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) / ((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) - (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:44
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st cos th1 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) & cos th2 : ( ( real ) ( V11() V12() real ) number ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
(cos (th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / (cos (th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) - ((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / (1 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) + ((tan th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) * (tan th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) Real) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:45
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (tan ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) Real) * (cot ((th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( ) ( V11() V12() real ) set ) ;

theorem :: SIN_COS4:46
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st cos ((th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = tan ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) ;

theorem :: SIN_COS4:47
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st cos ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = tan ((th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) ;

theorem :: SIN_COS4:48
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st sin ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - (cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = cot ((th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) ;

theorem :: SIN_COS4:49
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) st sin ((th1 : ( ( real ) ( V11() V12() real ) number ) - th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) <> 0 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) holds
((sin th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - (sin th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - (cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = cot ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) Real) ;

theorem :: SIN_COS4:50
for th1, th2 being ( ( real ) ( V11() V12() real ) number ) holds ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) + (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) / ((cos th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) - (cos th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) set ) : ( ( ) ( V11() V12() real ) set ) = (cot ((th1 : ( ( real ) ( V11() V12() real ) number ) + th2 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) Real) * (cot ((th2 : ( ( real ) ( V11() V12() real ) number ) - th1 : ( ( real ) ( V11() V12() real ) number ) ) : ( ( ) ( V11() V12() real ) set ) / 2 : ( ( ) ( epsilon-transitive epsilon-connected ordinal natural V11() V12() real V29() ) M3(K28() : ( ( ) ( ) set ) ,K32() : ( ( ) ( V1() epsilon-transitive epsilon-connected ordinal ) M2(K6(K28() : ( ( ) ( ) set ) ) : ( ( ) ( ) set ) )) )) ) : ( ( ) ( V11() V12() real ) set ) ) : ( ( ) ( V11() V12() real ) Real) : ( ( ) ( V11() V12() real ) set ) ;