Originally Posted by

**viet** A circle C has center at the origin and radius 3. Another circle K has a diameter with one end at the origin and the other end at the point (0, 13). The circles C and K intersect in two points. Let P be the point of intersection of C and K which lies in the first quadrant. Let $\displaystyle (r,\theta) $ be the polar coordinates of P, chosen so that $\displaystyle r $is positive and $\displaystyle 0 \leq \theta \leq \pi/2$

Find $\displaystyle r $ and $\displaystyle \theta$