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If K = cos 20^(@) and cos x = 2K^(2) - 1...

If `K = cos 20^(@)` and `cos x = 2K^(2) - 1`, then the possible value of x between `0^(@)` and `360^(@)` are

A

`140^(@)`

B

`40^(@), 140^(@)`

C

`40^(@), 320^(@)`

D

`50^(@), 130^(@)`

Text Solution

Verified by Experts

The correct Answer is:
C
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