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If cot(theta + alpha), 3 cot theta, cot ...

If `cot(theta + alpha), 3 cot theta, cot (theta-alpha)` are in AP, then value of `(sin^(2)theta)/(sin^(2)alpha)` , wherever defined, is

A

`3/2`

B

3

C

`2/3`

D

2

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The correct Answer is:
A
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