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Sum of infinite terms of the series cot^...

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

A

`pi//4`

B

`tan^(-1)2`

C

`tan^(-1)3`

D

`tan^(-1)4`

Text Solution

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The correct Answer is:
B, C, D
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