is positive when the angle lies in Quadrants I and II.
Thus, in Quadrants I and II.
Correct answer is B.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b6ae144d2d789fd3f3f7f49a61a75fb4.png\")
is positive when the angle lies in Quadrants I and II.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8c558ba7b7ac24c4cac445230e9e01ee.png\")
in Quadrants I and II.![\"\"](\"/userfiles/image/steps_images/solution.JPG\")