Consider the equation below. f(x) = 9 sin(x) + 9 cos(x), 0≤x≤ 2π (a) Find the interval on which f is increasing. (Enter

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Consider the equation below. f(x) = 9 sin(x) + 9 cos(x), 0≤x≤ 2π

(a) Find the interval on which f is increasing. (Enter your answer using interval notation.) Find the interval on which fis decreasing. (Enter your answer using interval notation.) (b) Find the local minimum and maximum values of f local minimum value local maximum value (c) Find the inflection points. (x, y) (smaller x-value) ) (larger x-value)

Find the interval on which f is concave up. (Enter your answer using interval notation.) Find the interval on which f is concave down. (Enter your answer using interval notation.)