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

Range of `f(x)=(1)/(1-2cosx)` 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:
B
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