Observe the graph:
The orientation of the circle and the length of , the graph is of the circle .
.
The graph has a rectangular equation and a polar equation .
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=52257f1605fb2b790995dd69987af2c6.png\")
, the graph is of the circle ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=26ecfdb768bc48fef5052c677d10be8a.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=26ecfdb768bc48fef5052c677d10be8a.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d647f9e77003881d925efcce289ca27f.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8e6f5421c6da128e5db1062dcaa458df.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1e8b0b01247fd2ef9bc0fc7ba5fc5889.png\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ec2be354f74670af2ac54cf92caca9b1.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7926e18e60e5e3c3936473cac5c3966c.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7926e18e60e5e3c3936473cac5c3966c.png\")
and a polar equation .![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
and a polar equation .