यदि x+(1)/(x)=2 cos theta, तब x^(3) +(1)...

यदि `x+(1)/(x)=2 cos theta`, तब `x^(3) +(1)/(x^(3))` का मान होगा

A

`2 cos^(3) theta`

B

`2 cos 3 theta`

C

`8 cos^(3) theta`

D

`cos 3 theta`

लिखित उत्तर

Verified by Experts

The correct Answer is:

B

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