1. Let f(x) cos2(x) - 2 sin(x) for 0 27 x (a) Compute f'(x) and use it to find intervals where f(x) is increasing or decreasing for x in [0, 2m (b) Find the local extrema of f(x) for x in [0, 27]. Explain (c) Compute f"(x) and use it to find the intervals of concavity and inflection points of f(x) for in [0, 27

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