int cos^(-3//7)x sin^(-11//7)x dx is equ...

`int cos^(-3//7)x sin^(-11//7)x dx` is equal to

A

` log| sin^4//7)x|+c`

B

`4/7 tan^(4//7) x+c`

C

`(-7)/(4) tan^(-4//7) x+c`

D

`log |cos^(3//7)x|+C`

Verified by Experts

The correct Answer is:

C

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