The trigonometric equation is .
Find
Half angle trigonometric identity: .
Substitute in the trigonometric identity.
The value of trignomoteric equation is .
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..![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e3a2e3aed0348c5739f24a72823bb8ba.png\")
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in the trigonometric identity.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=38b324755bf33f9cdfbb47db77a82cfc.png\")
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.