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Find the intervals in which the function...

Find the intervals in which the function `f` given by `f(x)=(4sinx-2x-xcosx)/(2+cosx)i s` increasing decreasing, `x in (0,2pi)`

A

`(0, pi) uu (2pi, 4pi)`

B

`(0, (pi)/(2)) uu ((3pi)/(2), 2pi)`

C

`(0, (pi)/(4)) uu ((pi)/(2), pi)`

D

None of these

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The correct Answer is:
B
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