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If cos40^(@)=xandcostheta=1-2x^(2), then...

If `cos40^(@)=xandcostheta=1-2x^(2)`, then the possible values of `theta` lying between `0^(@)` and `360^(@)` is

A

`100^(@) and 260^(@)`

B

`80^(@) and 280^(@)`

C

`280^(@) and 110^(@)`

D

`110^(@) and 260^(@)`

Text Solution

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The correct Answer is:
A
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