@MISC{EUCLID10.MIZ,
  AUTHOR = {Coghetto, Roland},
  TITLE = {Some Facts about Trigonometry and Euclidean Geometry},
  DAY = {29},
  MONTH = {September},
  YEAR = {2014},
  ADDRESS1 = {Rue de la Brasserie 5\\7100 La Louvi\`ere, Belgium},
  SECTION1 = {Values of the Trigonometric Functions for Angles: $\frac{\pi}{3}$ and $\frac{\pi}{6}$},
  SECTION2 = {Some Trigonometric Identities},
  SECTION3 = {Trigonometric Functions and Right Triangle},
  SECTION4 = {Triangle Inscribed in a Semicircle is a Right Triangle},
  SECTION5 = {Diameter of the Circumcircle of a Triangle},
  SECTION6 = {Some Identities of a Triangle},
  SECTION7 = {Diameter of a Circle},
  SUMMARY = {We calculate the values of the trigonometric functions
  for angles: $\frac{\pi}{3}$ and $\frac{\pi}{6}$. After some trigonometric identities,
  we demonstrate conventional trigonometric formulas in the triangle,
  and the geometric property of the triangle inscribed in a semicircle.
  Then we define the diameter of the circumscribed circle of a triangle
  using the definition of the area of a triangle and prove some
  identities of a triangle. We conclude by indicating that a diameter
  of a circle is twice as long as the length of the radius.}}

@BOOK{Coxeter:1967,
 AUTHOR={Coxeter, H.S.M. and Greitzer, S.L.},
 TITLE={Geometry Revisited},
 PUBLISHER={The Mathematical Association of America (Inc.)},
 YEAR=1967}

