1. The problem statement, all variables and given/known data Find an equivalent equation in polar coordinates. 2. Relevant equations x^2 + 4y^2 = 4 Anyone know how to do this? I don't remember how when it's an equation...=S My best guess is (rcos theta)^2 + 4(rsin theta)^2 = 4...but that's as far as I can get.