![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
a)
\The trigonometric function is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fc5d0a6f76f3a19f097f63d4ef1dae3d.png\")
.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=04e5fcd893ce4dbda7f49eb9b768c3f1.png\")
Using calculator
\Function Calculator Keystrokes Display
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=514d1cc1dcc75883c68505bc4760feb4.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9f51e6a47ee604061eaaf785683d6fcc.png\")
2.6695
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
b)
\The trigonometric function is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=23fe054c5ccb09d5d0e4eadca4e65650.png\")
.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=24ae2d8a3d3deb0c534978daa9b2fc10.png\")
Using calculator
\Function Calculator Keystrokes Display
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=149cdb6c5f74dcbac1d9acf4e1cbf6b1.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=997a903ce391d9d00844482293f0d30c.png\")
0.0699
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
(a) The value of is 2.6695.
(b) The value of is 0.0699.