Let f(x)=4cossqrt(x^2-pi^2/9 Then the ra...

Let `f(x)=4cossqrt(x^2-pi^2/9` Then the range of `f(x)` is

A

[-1,1]

B

[-4,4]

C

[0,1]

D

None of these

Verified by Experts

The correct Answer is:

B

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