1. The problem statement, all variables and given/known data If f(x) = sin²(3-x), then f ' (0) = ____ . A. -2cos3 B. -2sin3cos3 C. 6cos3 D. 2sin3cos3 E. 6sin3cos3 2. Relevant equations Derivative of Sinx= cosx. 3. The attempt at a solution I cannot seem to figure out what the derivative would be with this function. sin(3-x) * sin(3-x) = Cos(3-x) * Cos(3-x), then plug in 0 for x? Is there a simpler way using "u" substitution? Thanks!