1.

Sum of infinite terms of the series cot^(-1)(1^(2)+3/4)+cot^(-1)(2^(2)+3/4)+cot^(-1)(3^(2)+3/4)+….. is

Answer»

`pi//4`
`tan^(-1)2`
`tan^(-1)3`
`tan^(-1)4`

ANSWER :B::C::D


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