.
Where is measured in degrees.
We have , where is measured in radians.
Substitute in .
Substitute in above expression.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=51994f30f137e97f90bcae511123c160.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=401dfc03d5a8a06a3a1afbe88b95cc4f.png\")
is measured in degrees.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9ebbd84c104bb6474e66c6897e407da5.png\")
, where is measured in radians.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=512ab2f2a61dde4fbfbb2bdd7926368f.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cf9d4f7bf4785f85c8044825cfaa2958.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e870b10c84351195fbbed72e01de3a80.png\")
in ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bd3a904cd7db5e3a4ce87f5b97d91baf.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=91722a29d6a3de4ace9c37d9dc88142f.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=27f624fd4f33bd95fbe87762c6b2079a.png\")
in above expression.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dfe2e613807d4df801846e9a468ec9bc.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dfe2e613807d4df801846e9a468ec9bc.png\")
.