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If costheta=cos alphacosbeta, then tan((...

If `costheta=cos alphacosbeta, then tan((theta+alpha)/(2))tan((theta-alpha)/(2))` is equal to

A

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

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
B
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