MCQ
$2 \cos ^{-1} \mathrm{x}$ का मान है-
  • A
    $\sin ^{-1}\left(2 x^{2}-1\right)$
  • B
    $\cos ^{-1}\left(2 \mathrm{x}^{2}-1\right)$
  • C
    $\cos ^{-1} \sqrt{1-x^{2}}$
  • D
    $\sec ^{-1} \frac{1}{x}$

Answer

self

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