1. The problem statement, all variables and given/known data I am suppose to use polar coordinate data to find derivatives, ie x = r cos(theta) y = r sin(theta) r^2 = x^2 + y^2 2. Relevant equations show dtheta/dy = cos(theta)/r show dtheta/dx = -sin(theta)/r in other words since i dont have the math script find the equation for theta and take the derivatives These are partial derivatives by the way (as you can tell by inspection) 3. The attempt at a solution d theta / dy = cos(theta)/r I separate and integrate dtheta/cos(theta) = dy/sqrt(x^2+y^2) ln(cos(theta)) = ln(sqrt(x^2+y^2))/(0.5(x^2+y^2)^-.5*2y) => per chain rule ln(cos(theta))=ln(r)*r/ r*sin(theta) ln(cos(theta)) = ln(r)/ sin(theta) now what? any help is very much appreciated. Thanks for looking. have a good one.