$x$ ની કઈ કિંમત માટે $\sin \left(\cot ^{-1}(x)\right)=\cos \left(\tan ^{-1}(1+x)\right)$ થાય?

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

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${\sin ^{ - 1}}\left[ {x\sqrt {1 - x} - \sqrt x \sqrt {1 - {x^2}} } \right] = $

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