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If x+(1)/(x)=2cos alpha then x^(n)+(1)/(...

If `x+(1)/(x)=2cos alpha` then `x^(n)+(1)/(x^(n))`=

A

`2^(n)cosalpha`

B

`2^(n)cosnalpha`

C

`2^(n)sinnalpha`

D

`2^(1)cosnalpha`

Text Solution

Verified by Experts

The correct Answer is:
D
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