Convert the Cartesian coordinate (2,-1) to polar coordinates, 0 ≤ 0 < 2π, r > 0 r = √5 Enter exact value. 0 ||

Find all points of intersection (r,θ) of the Lemniscate r^2=25cos(2θ), and the circle r=1 for values of θ satisfying −π/2<θ<π/2   Note: In this problem the curves intersect at two points. Enter the answers in the form (r,θ) with θ measured in radians.

please solve this question, handwriting should be clear

Z is a complex variable z=x+iy  question attached as photo