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int0^(pi) (dx)/(a+b cos x) =...

`int_0^(pi) (dx)/(a+b cos x) =`

A

`pi/(sqrt (a^(2)-b^(2))`

B

`pi/(ab)`

C

`pi/(sqrt (a^(2)+b^(2))`

D

`(a+b)pi`

Text Solution

Verified by Experts

The correct Answer is:
A
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