cos[((180-theta))/(2)] cos [((180-9theta...

`cos[((180-theta))/(2)] cos [((180-9theta))/(2)] +sin[((180-3theta))/(2)] sin[((180-13theta))/(2)]` का मान क्या है ?

A

`sin 2theta sin 4 theta`

B

`cos 2theta cos 6theta`

C

`sin 2thetasin 6theta`

D

`cos 2theta cos 4theta`

Verified by Experts

The correct Answer is:

B

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