int(dx)/(7+5 cosx) is equal to...

`int(dx)/(7+5 cosx)` is equal to

A

`1/sqrt(3)tan^(-1)(1/sqrt(3) tanx/2)+c`

B

`1/sqrt(6)tan^(-1)((tan(x/2))/(sqrt(6)))+c`

C

`1/4 tan^(-1)(tanx/2)+c`

D

`1/4 tan^(-1)(tan x/2)+c`

Verified by Experts

The correct Answer is:

B

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