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If cos theta=(cosalpha-cos beta)/(1-cosa...

If `cos theta=(cosalpha-cos beta)/(1-cosalpha cos beta)`, then one of the vlaues of `tan((theta)/(2))` is

A

`cot""(beta)/2tan""(alpha)/2`

B

`tanalphatan""(beta)/2`

C

`tan""beta/2cot""alpha/2`

D

`tan^2""alpha/2tan""beta/2`

Text Solution

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The correct Answer is:
A
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