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If 3 sin beta= sin( 2alpha+beta), then...

If `3 sin beta= sin( 2alpha+beta)`, then

A

`(cot alpha+cot(alpha+beta))(cot beta-3cot(2alpha-beta))=6`

B

`sin beta=cos(alpha+beta)sin alpha`

C

`tan(alpha+beta)=2tan alpha`

D

`2sin beta=sin(alpha+beta)cos alpha`

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A, B, C, D
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VIKAS GUPTA (BLACK BOOK) ENGLISH-COMPOUND ANGLES-Exercise-2 : One or More than One Answer is/are Correct
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