1.

If 2 int_(0)^(1) tan^(-1) x dx = int_(0)^(1) cot^(-1) (1- x+x^(2))dx, then int_(0)^(1) tan^(-1) (1-x+x^(2))dx is equal to

Answer»

`pi/2 + LOG 2`
`log 2`
`pi/4 + log 4`
`log 4`

ANSWER :B


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