The trignometric function is .
(Use a caluculator)
The approximate value of to four decimal places is .
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=004bd4ba3f5ef0b4af803ac4f97d4791.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=52c28e8b23b432ed0b00aaa8d15c26b1.png\")
.