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Solves cos^(-1) x lt 2...

Solves `cos^(-1) x lt 2`

A

`x in (cos2, 2)`

B

`x in (0, 1)`

C

`x in (-1, 1)`

D

`x in (cos2, 1)`

Text Solution

Verified by Experts

The correct Answer is:
D
`cos^(-1) x gt 2`
or `0 le cos^(-1) x lt 2`
or `cos 0 ge x gt cos 2` (`:. Cos^(-1) x`is decreasing function)
`rArr x in (cos 2, 1]`
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