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Find the principal value of: cos^(-1)((s...

Find the principal value of: `cos^(-1)((sqrt(3))/2)`

A

`pi/6`

B

`(5pi)/6`

C

`(7pi)/6`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Let `cos^(-1)(sqrt(3)/2)=x,` where `x in [0,pi]`
Then, `cosx=sqrt(3)/2=cospi/6 rArr x=pi/6`
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