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If cos theta = ( cos alpha - cos beta )/...

If `cos theta = ( cos alpha - cos beta )/(1- cos alpha cos beta ) " then " tan^(2)""((theta )/(2)) tan^(2)""((beta)/(2))=`

A

`"tan"(alpha)/2`

B

`"tan"^(2)(alpha)/2`

C

`"cot"(alpha)/2`

D

`"cot"^(2)(alpha)/2`

Text Solution

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The correct Answer is:
B
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