Find the intervals in which the function...

Find the intervals in which the function f given by
`f(x) = (4sin x-2x-xcos x )/(2+cosx)`
is (i) increasing (ii) decreasing.

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The correct Answer is:

`o lt= x lt= (pi)/(2) "and" (3pi)/(2) lt xlt 2pi (ii) (pi)/(2) lt x lt (3pi)/(2)`

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