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The equation whose roots are nth power ...

The equation whose roots are `nth` power of the roots of the equation, `x^2-2xcosphi + 1=0` is given by

A

`(x + cos n phi)^(2) + sin^(2) n phi =0`

B

` (x -cos n phi)^(2) + sin^(2) n phi = 0`

C

` X^(2)+2x cos n phi + 1=0`

D

` x^(2)-2x cos n phi +1=0`

Text Solution

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The correct Answer is:
B, D
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