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If x+1/x =2 cos theta, then (x^(3) + (1)...

If `x+1/x =2 cos theta, `then `(x^(3) + (1)/(x^(3)))`is equal to-

A

`cos 3 theta `

B

`2 cos 3 theta `

C

`1/2 cos 3 theta `

D

`1/3 cos 3 theta `

Text Solution

Verified by Experts

The correct Answer is:
B
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