1. The problem statement, all variables and given/known data Rotate the region bound by the given curve by about the x and y axis. Find the volume through the cylindrical method. x^2 + (y-1)^2 = 1 2. Relevant equations Cylindrical method: ∫2∏xf(x)dx Slice Method: ∫A(x)dx 3. The attempt at a solution x^2 + (y-1)^2 = 1 x = √(2y - y^2) ∫2∏x(√(1-x^2)+1)dx from -1 to 1 But this simplifies to 0... What am I doing wrong?