Question: 4. (10 points) Let f(x) = cos(x) 2sin(x) (21) Find f '(x). (b) Plot f(x) and your f'(x). (c) For what values of x (0


4. (10 points) Let f(x) = cos(x) 2sin(x) (21) Find f '(x). (b) Plot f(x) and your f'(x). (c) For what values of x (0
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