1. The problem statement, all variables and given/known data find the d^2y/dx^2 if y^3 + y = 2 cos x at the point (0,1) 2. Relevant equations 3. The attempt at a solution my dy/dx = (-2 sin x)/(3y^2 + 1) I don't know how to find d^2y/dx^2? And when and how will I use the oint (0,1)?