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If Cos20^0=k and Cosx=2k^2-1, then the p...

If `Cos20^0=k` and `Cosx=2k^2-1`, then the possible values of x between `0^0 and 360^0` are

A

`140^(@)`

B

`40^(@) " and "140^(@)`

C

`40^(@) " and "320^(@)`

D

`50^(@) " and "130^(@)`

Text Solution

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The correct Answer is:
C
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