A.  (1/22n)cosec2x/2n+cosec2x

B.  –(1/22n)cosec2x/2n+cosec2x

C.  cosec2x/2n+cosec2 x

D.  none

Correct Answer :
–(1/22n)cosec2x/2n+cosec2x
Explanation :
No Explanation available for this question
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