int(pi//4)^(3pi//4) (x)/(1+sin x)dx=...

`int_(pi//4)^(3pi//4) (x)/(1+sin x)dx=`

A

`pi( sqrt2-1)`

B

`pi (sqrt2+1)`

C

`2pi (sqrt2-1)`

D

`(pi)/(sqrt2+1)`

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The correct Answer is:

A, D

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