$\cos \left(\tan ^{-1}\left(\sin \left(\cot ^{-1} x\right)\right)\right)$ का मान है

  • A
    $\sqrt{\frac{x^2+1}{x^2-1}}$
  • B
    $\sqrt{\frac{1-x^2}{2+x^2}}$
  • C
    $\sqrt{\frac{1-x^2}{1+x^2}}$
  • D
    $\sqrt{\frac{x^2+1}{x^2+2}}$

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