$2 \cos ^{-1} x = \sin ^{-1} \left( 2 x \sqrt{1 - x^2} \right)$,$x$ के किन मानों के लिए मान्य है?

  • A
    $-1 \leq x \leq 1$
  • B
    $0 \leq x \leq 1$
  • C
    $\frac{1}{\sqrt{2}} \leq x \leq 1$
  • D
    $0 \leq x \leq \frac{1}{\sqrt{2}}$

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