tan^(-1)n ,tan^(-1)(n+1) and tan^(-1)(n+...

`tan^(-1)n ,tan^(-1)(n+1)` and `tan^(-1)(n+2),n in N ,` are the angles of a triangle if `n=` 1 (b) 2 (c) 3 (d) None of these

A

`-1`

B

1

C

2

D

None of these

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The correct Answer is:

A

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