1.

ज्ञात करे[ Evalute] `int _(0)^(1) (log (1+x))/(1+x^(2))dx`

Answer» x = tan `theta ` , रखे , तो ` I = int _(0)^(pi//4) log (1+tan theta ) d theta = pi/8 log 2 ` [ 16 (i) कि तरह ]


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