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If int(cos 4x+1)/(cotx-tanx)dx=a cos 4x+...

If `int(cos 4x+1)/(cotx-tanx)dx=a cos 4x+c,` then `a=`

A

`-(1)/(2)`

B

`-(1)/(8)`

C

`-(1)/(4)`

D

`(1)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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