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If f(x)=sin(3x)/sin x,x!=npi, then th...

If `f(x)=sin(3x)/sin x,x!=npi`, then the range of values of f(x) for real values of x is

A

`[-1.3]`

B

`[-infty, -1]`

C

`(3,+infty)`

D

`[-1.3]`

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The correct Answer is:
D
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