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<span class="kw">let </span><font color="Maroon" title="c1">x</font> be   <a href="xreal_0.html#NM1" title="XREAL_0:NM.1">Real</a>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> (  <a href="sin_cos2.html#K4" title="SIN_COS2:func.4">cosh</a> <font color="Maroon" title="c1">x</font> <a href="xxreal_0.html#NR2" title="XXREAL_0:NR.2">&gt;=</a> 1 &amp;  <a href="sin_cos2.html#K4" title="SIN_COS2:func.4">cosh</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1 &amp;  <a href="sin_cos2.html#K2" title="SIN_COS2:func.2">sinh</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>  )</span><br/>

<a NAME="E1:1"/>
<a href="sin_cos2.html#K3" title="SIN_COS2:func.3">cosh</a> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c1">x</font> <a href="xxreal_0.html#NR2" title="XXREAL_0:NR.2">&gt;=</a> 1
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="sin_cos2.html#T37" onmouseover="rs('sin_cos2/T37')" onmouseout="rh()">SIN_COS2:37</a></span>;<br/>
<span class="kw">hence </span><a NAME="E2:1"/>
(  <a href="sin_cos2.html#K4" title="SIN_COS2:func.4">cosh</a> <font color="Maroon" title="c1">x</font> <a href="xxreal_0.html#NR2" title="XXREAL_0:NR.2">&gt;=</a> 1 &amp;  <a href="sin_cos2.html#K4" title="SIN_COS2:func.4">cosh</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1 &amp;  <a href="sin_cos2.html#K2" title="SIN_COS2:func.2">sinh</a> <a href="numbers.html#K5" title="NUMBERS:func.5">0</a> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">0</a>  )
 <span class="kw">by</span> <span class="lab"><a class="ref" href="sin_cos2.html#T15" onmouseover="rs('sin_cos2/T15')" onmouseout="rh()">SIN_COS2:15</a>, <a class="ref" href="sin_cos2.html#T16" onmouseover="rs('sin_cos2/T16')" onmouseout="rh()">SIN_COS2:16</a>, <a class="ref" href="sin_cos2.html#D2" onmouseover="rs('sin_cos2/D2')" onmouseout="rh()">SIN_COS2:def 2</a>, <a class="ref" href="sin_cos2.html#D4" onmouseover="rs('sin_cos2/D4')" onmouseout="rh()">SIN_COS2:def 4</a></span>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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