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Value of tan^(-1)1/3+tan ^(-1)1/5+tan^(-...

Value of `tan^(-1)1/3+tan ^(-1)1/5+tan^(-1)1/7+tan^(-1)1/8` is

A

`(pi)/(4)`

B

`(3pi)/(4)`

C

`pi)`

D

none of these

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The correct Answer is:
A
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