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(sin 3 alpha)/(cos 2 alpha) lt 0 if alp...

`(sin 3 alpha)/(cos 2 alpha) lt 0 if alpha` lies in

A

`((13 pi)/(48), (14 pi)/(48))`

B

`((14 pi)/(48), (18 pi)/(48))`

C

`((18 pi)/(48),(23 pi)/(48))`

D

`(0, (pi)/(2))`

Text Solution

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The correct Answer is:
A
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