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int(pi//4)^(3pi//4) (dx)/(1+ cos x) is e...

`int_(pi//4)^(3pi//4) (dx)/(1+ cos x)` is equal to

A

`-1`

B

`-2`

C

`2`

D

`4`

Text Solution

Verified by Experts

The correct Answer is:
C
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