The trignometric function is .
(Use a caluculator)
The approximate value of to four decimal places is .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5ea5592c2edbaf4c5c129bd390b4d1fd.png\")
(Use a caluculator) ![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
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to four decimal places is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d72e6dc0585b56ebd1a7067894d063cb.png\")
.