1. The problem statement, all variables and given/known data Use the Stokes' Theorem to show that [itex]\int[/itex]f(∇ X A) dS = [itex]\int[/itex](A X ∇f) dS + [itex]\oint[/itex]f A dl 2. Relevant equations Use vector calculus identities. Hint given : Start with the last integral in the above relation. 3. The attempt at a solution To be honest, I really don't know how to start doing this. I could understand Stokes theorem when needed to evaluate the circulation, vector and surface, but I don't have any idea on how to start to prove this relation. Please help?