1.

2 int_(0)^(1) (tan^(-1)x)/(x) dx=

Answer»

`int_(0)^(pi//2) (sin x)/(x)DX`
`int_(0)^(pi//2) (x)/(sin x) dx`
`int_(0)^(pi//2) (1)/(sin x) dx`
`int_(0)^(pi) (x)/(sin x) dx`

Answer :B


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