Convert the equation r cos theta = sin (2 theta) to Cartesian coordinates. Describe the resulting curves. Choose the correct equations below. A. x^2+ y^2 =1^2 and x = 0 B. (x - 1)^2 (y - 1)^ and x = 0 C. (x - 1)^2 + y^2 and x = 0 D. x^2 (y - 1)^2 = 1^2 and x = 0