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The value of tan{(cos^(-1)(-(2)/(7))-(p...

The value of `tan{(cos^(-1)(-(2)/(7))-(pi)/(2))}` is :

A

`(2)/(3sqrt(5))`

B

`(2)/(3)`

C

`(1)/(sqrt(5))`

D

`(4)/(5)`

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The correct Answer is:
A
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