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int(cos7x-cos8x)/(1+2cos 5x)dx=...

`int(cos7x-cos8x)/(1+2cos 5x)dx=`

A

`(1)/(2)cos 2x-(1)/(3)cos 3x+c`

B

`(1)/(2)cos 2x+(1)/(3)cos 3x+c`

C

`(1)/(2)sin 2x-(1)/(3)3x+c`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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