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If sin theta = n sin (theta + 2 alpha )...

If ` sin theta = n sin (theta + 2 alpha ) , " then " (1- n) tan ( theta + alpha ) = `

A

`( n+1) tan alpha `

B

`(n-1) tan alpha `

C

`(n+1) tan beta `

D

`(n-1) tan beta `

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The correct Answer is:
A
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