1. The problem statement, all variables and given/known data Assume that you are given differentiable function f(t) and g(t). Find a formula for the derivative of the cross product u(f(t)) x v(g(t)). 2. Relevant equations d/dt(u(t) x v(t)) = (u'(t) x v(t) + u(t) x v'(t) 3. The attempt at a solution So in this case I was thinking that you would just substitute f(t) and g(t) where t would be in the regular equation, so it would be U'(f(t)) x v(g(t)) + u(f(t)) x v'(g(t)), for the equation, but I have a feeling that thats not right just because it seems too simple.