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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^@ and 140^@`

C

`50^@ and 130^@`

D

`40^@ and 320^@`

Text Solution

Verified by Experts

The correct Answer is:
D
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