What is the derivative of sin(x^2 + 5) cos(x^2 + 9x + 2)? What is the derivative of f(x) times g(x), if f(x) = sin(x) and g(x) = x^2? What is the derivative of sin(x) cos(x) tan(x)? What is the derivative of f(x) = cos(x) + sin(x)? Compute the der...