Step 1:
The trigonometric function is .
( Since )
Properties of inverse trigonometric functions :
.
Solution :
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..![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=691ecfd90aa7a12c3e9646cd8e94d3f9.png\")
( Since ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3c174d3589d3ea73ddc75cdaf7f07bc4.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=38847c073dcad23f6bb1c0dd9a278668.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e79a557013c1d8b2642f3d5a029501a4.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=349cf4398fa44fc1fd288864ff95b4f6.png\")
.