If m and M are the minimum and the maxim...

If m and M are the minimum and the maximum values of `4+1/2 sin^2 2x-2cos^4x, x in R` then

A

`(9)/(4)`

B

`(15)/(4)`

C

`(7)/(4)`

D

`(1)/(4)`

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The correct Answer is:

A

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