# Math Help - Parametric equations for conic sections

1. ## Parametric equations for conic sections

How would I go about solving this:
Find parametric equtions for the conic section x^2+y^2-9=0
Thanks

2. Originally Posted by emetty90
How would I go about solving this:
Find parametric equtions for the conic section x^2+y^2-9=0
Thanks
$x^2 + y^2 = 9$ is a circle of radius 3 and centre at the origin. The standard parametric equations in this instance are therefore $x = 3 \cos t$ and $y = \, ....$