The trigonometric expression is
.
\
Apply trigonometric ratio formulas:
and
.
\
\
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e49bec7e68ac3a60a045fb334f2b170a.png\")
..![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0eb5ae11dbf91e04aa569a7411ed81c9.png\")
and ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3469e9d31eac6e849cbe195f075d449b.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1ba3c926067dd20f61ad509db4129066.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f36be71747d9a95b8ae18f0d3f4f5725.png\")