1. The problem statement, all variables and given/known data Suppose that in spherical coordinates the surface S is given by the equation rho * sin(phi)= 2 * cos(theta). Find an equation for the surface in cylindrical and rectangular coordinates. Describe the surface- what kind of surface is S? 2. Relevant equations 3. The attempt at a solution r= rho * sin (phi) r^2= (rho * sin(phi)^2 r^2= 4 cos ^2 (theta) x^2 + y^2= 4 cos^2 (theta) And now I'm drawing a blank. Can someone please help me on how to continue?- I'm clueless! Thank you!