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The value of cot(sum(n=1)^(19)cot^(-1)(1...

The value of `cot(sum_(n=1)^(19)cot^(-1)(1+ sum_(p=1)^(n)2p))` is:

A

`20/19`

B

`19/21`

C

`21/19`

D

`19/20`

Text Solution

Verified by Experts

The correct Answer is:
C
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