Find the intervals in which the function...

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

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The correct Answer is:

(i) Increasing : (0,`pi/2)uu`((3pi)/(2),2pi)`
(ii) Decreasing : `(pi/2,(3pi)/(2))`

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