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If $C o s 20^{0} = k$ and $\cos x = 2 k^{2} - 1$ , then the possible values of x between 0⁰ and 360⁰ are

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detailed solution

Correct option is C

cos200=K;cosx=2K2−1=2cos2200−1=cos400on verification x=400 & 3200 satisfies

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If Cos200=k and cosx=2k2−1, then the possible values of x between 00 and 3600 are

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If $C o s 20^{0} = k$ and $\cos x = 2 k^{2} - 1$ , then the possible values of x between 0⁰ and 360⁰ are