Trigonometric expression is .
The terminal side of lies in Quadrant IV.
Therefore, its reference angle is .
The angle in Quadrant IV is negative.
.
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fb7408371599591b44019d9c1ae9001a.png\")
lies in Quadrant IV.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c18406fa9daf3edb420675d7e200d33b.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8722c1d35d1105dc0a665f20e9ba3739.png\")
in Quadrant IV is negative.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8171524a377e4919a3411f3b30d60b65.png\")
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.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
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.