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Show that underset(0)overset(pi//2)int (...

Show that `underset(0)overset(pi//2)int (x)/(sinx+cosx)dx=(pi)/(2sqrt(2))log (sqrt(2)+1)` .

A

`(pi)/(2sqrt2)log(sqrt2-1)`

B

`(pi)/(2sqrt2)log(sqrt2+1)`

C

`(pi)/(sqrt2)log(sqrt2+1)`

D

none

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