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Range of f(x)=(1)/(1-2 cos x) is :...

Range of `f(x)=(1)/(1-2 cos x) is :`

A

`[(1)/(3), 1]`

B

`[-1,(1)/(3)]`

C

`(-oo, -1] uu [(1)/(3), oo)`

D

`[-(1)/(3),1]`

Text Solution

Verified by Experts

The correct Answer is:
C
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