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int (dx)/(cos x-sin x) is equal to :...

`int (dx)/(cos x-sin x)` is equal to :

A

`1/sqrt2 log [tan (x/2 -(3pi)/8)]`

B

`1/sqrt2 log [tan (x/2 +(3pi)/8)]`

C

`1/sqrt2 log [tan (x/2 -(pi)/8)]`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
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