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tan ^(-1)((1)/(3))+tan ^(-1) (1)/(7)+tan...

`tan ^(-1)((1)/(3))+tan ^(-1) (1)/(7)+tan ^(-1) (1)/(13)+…..+tan ^(-1) (1)/(n^(2)+n+1)+.. . oo=`

A

`(2 pi)/(3)`

B

0

C

`(pi)/(2)`

D

`(pi)/(4)`

Text Solution

Verified by Experts

The correct Answer is:
D
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