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If cot^(-1) x = (2pi)/7 for some x in ...

If `cot^(-1) x = (2pi)/7` for some `x in R` the value of `tan^(-1) x ` is :

A

`(3pi)/14`

B

`(-3pi)/14`

C

`(7pi)/12`

D

`(-7pi)/2`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • If "cot"^(-1)x=(2pi)/(5) for some x in R , the value of tan^(-1)x is

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