5л find the exact value of each expression below. If 0 6 cos 20 (a) ? (b) cos (-0) I cos e (c) = COS O X

Q: Find the critical points:

A: To determine the critical points of given function.

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A: To determine the value of x.

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A: Click to see the answer

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A: Factor out 2. 

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A: The given function is

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