\
The angle is
.
\
Convert the angle into radian measure.
\
\
\
The angle is
radians.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=06eb356cec13dc97d79fa01eba7486cc.png\")
. ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=558173a5b01e99d015d5112cf017e12d.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ba2cc68b90b7b81873ad3097f7972010.png\")
radians.