Use calculus to find the absolute maximum and minimum values of the function. f(x) = 2x − 4 cos(x), −2 ≤ x ≤ 0?

Use calculus to find the absolute maximum and minimum values of the function. f(x) = 2x − 4 cos(x), −2 ≤ x ≤ 0 (a) Use a graph to find the absolute maximum and minimum values of the function to two decimal places. (b) Use calculus to find the exact maximum and minimum values. I need help I just can not figure... show more Use calculus to find the absolute maximum and minimum values of the function.
f(x) = 2x − 4 cos(x), −2 ≤ x ≤ 0
(a) Use a graph to find the absolute maximum and minimum values of the function to two decimal places.

(b) Use calculus to find the exact maximum and minimum values.

I need help I just can not figure out it:(
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