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If m and M are the minimum and the maximum value of 4 + 1/2sin^22x - 2cos^4x, x ∈ R,

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in Limit, continuity and differentiability by (41.5k points)

If m and M are the minimum and the maximum value of 4 + 1/2sin22x -  2cos4x, x ∈ R, then M − m is equal to

(A) 9/4

(B) 15/4

(C) 7/4

(D) 1/4

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1 Answer

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Best answer

Answer is (A) 9/4

We have

Hence,

M - m = 17/4 - 8/4 = 9/4

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