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Ifint(-pi)^((3pi)/4)((e^(pi/4)dx)/((e^x+...

`Ifint_(-pi)^((3pi)/4)((e^(pi/4)dx)/((e^x+e^(pi/4))(sinx+cosx))=kint_(-pi/2)^(pi/2)secx dx ,t h e nt h ev a l u eofki s` `1/2` (b) `1/(sqrt(2))` (c) `1/(2sqrt(2))` (d) `-1/(sqrt(2))`

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