![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Find the direction angle of a vector in the fourth quadrant, use the vertical and horizontal components of the vector and the trigonometric equation ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ac836f038d94cdc209d867cba853c2bd.png\")
.
To determine the angle that the vector makes with the positive ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8da2268e35b6b6daab9c47f71c4c8bf4.png\")
-axis.
Since the horizontal component will be positive and the vertical component will be negative in the fourth quadrant, using the trigonometric equation will produce a negative value for ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=401dfc03d5a8a06a3a1afbe88b95cc4f.png\")
.
Add ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=401dfc03d5a8a06a3a1afbe88b95cc4f.png\")
value to ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=05f89e8daad0712569d04a0eded353ca.png\")
to find the direction angle of the vector in the fourth quadrant.
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The horizontal component will be positive and the vertical component will be negative in the fourth quadrant.
\The trigonometric equation ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ac836f038d94cdc209d867cba853c2bd.png\")
will produce a negative value for .
Add value to ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=05f89e8daad0712569d04a0eded353ca.png\")
to find the direction angle of the vector in the fourth quadrant.