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If y=(sin 3theta)/(sintheta), theta nen ...

If `y=(sin 3theta)/(sintheta), theta nen pi, ` then

A

`y in[-1,3]`

B

`y in(-oo,-1]`

C

`y in(3,oo)`

D

`y in[-1,3)`

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The correct Answer is:
D
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