Intersection points of two curves

Question

I have a curve given in polar coordinates with ($r = 2 +2\sin\theta$ for example) and one equation of simple circle (for example $x^{2}+y^{2} = 9 $).How can i find intersection points?Since X Co-ordinate of the curve in polar coordinate is $x = r\cos\theta$ and for y, $y= r\sin\theta$, can someone give me a tip how do i find there intersection points? i have three equation.