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The value of sec^(-1)(sec(8pi)/5) is...

The value of `sec^(-1)(sec(8pi)/5)` is

A

`(2pi)/5`

B

`(3pi)/5`

C

`(8pi)/5`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Let `sec^(-1)(sec(8pi)/5)=sec(2pi-(2pi)/5)=sec(2pi)/5 rArr x=(2pi)/5`.
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