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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)/(2)tan.(alpha)/(2)`

B

`tan alpha tan.(beta)/(2)`

C

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

D

`tan^(2).(alpha)/(2) tan^(2).(beta)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
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