1. The problem statement, all variables and given/known data Find the curvature at the point (x, y) on the ellipse x^2/9+y^2/4=1. 2. Relevant equations None. 3. The attempt at a solution x^2/a^2+y^2/b^2=1 so I know that a=3 and b=2 for this problem. x(t)=acos(t) and y(t)=bsin(t) so x(t)=3cos(t) and y(t)=2sin(t) now what? What's the formula for finding the curvature for this problem? The answer is 162/(81-5x^2)^(3/2).