सिद्ध कीजिये - int(0)^(pi//2)(sinx)/(s...

सिद्ध कीजिये -
`int_(0)^(pi//2)(sinx)/(sinx+cosx)dx=int_(0)^(pi//2)(cosx)/(sinx+cosx)dx`
`=int_(0)^(pi//2)(dx)/(1+cotx)=int_(0)^(pi//2)(dx)/(1+tanx)=(pi)/(4)`

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