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If $\cos (2 \tan^{- 1} x) = \frac{1}{2},$ then the value of $x,$ is

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Correct option is B

cos⁡2tan−1⁡x=12⇒ 2tan−1⁡x=π3⇒tan−1⁡x=π6⇒x=tan⁡π6=13

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If cos⁡2tan−1⁡x=12, then the value of x, is

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If $\cos (2 \tan^{- 1} x) = \frac{1}{2},$ then the value of $x,$ is