10.6 polar coordinates

Wussup mathletes in the wonderful mathland, here is another review of polar coordinates
Remember that they are denoted by (r, theta), where r is the distance from the center and theta is the angle of the line from a polar axis.
Now, how do we convert between rectangular equations to polar equations.
Here are some conversion formulas
x=r cos theta
y = r sin theta

tan theta = y/x
r^2 = x^2 + y^2

here's an example:
3x - 2y = 6
3(r cos theta) - 2(r sin theta) = 6
(r( 3 cos theta - 2 sin theta) = 6)/ (3cos theta - 2 sin theta)
r = 6/(3 cos theta - 2 sin theta)