The derivative of the sine function, sin x, is the cosine function, cos x. Use the chain rule to differentiate the following functions. In WebAssign, use parentheses around the quantity whose sine or cosine you wish to take. As an example, sin (3x). a. f (x) = sin (3 r) f'(x) = b. C. d. f(x) = sin (5x5) f'(x) = f(x)=sin (4 x) f'(x) = f(x) = sin (sin (4 x)) f'(x) =