The parametric equations are and .
Graph:
Graph the equations. \ \
Observe the graph:
The equations and matches with the graph a.
The correct choice is .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=049d1d55f3a6066ed305123d6bc63498.png\")
and ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0444f8f923dc7a8938a24158d15bd257.png\")
.![\"\"](\"/userfiles/470-47.gif\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=049d1d55f3a6066ed305123d6bc63498.png\")
and ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0444f8f923dc7a8938a24158d15bd257.png\")
matches with the graph a.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e7e45144a5880b09f4ba35ecfa2e0a2b.png\")
.