જો $x = {\sin ^{ - 1}}(\sin 10)$ અને $y = {\cos ^{ - 1}}(\cos 10)$ હોય,તો $y - x$ ની કિંમત શોધો.

  • A
    $\pi $
  • B
    $7\pi $
  • C
    $0$
  • D
    $10$

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જો $\tan ^{-1}\left[\frac{\sqrt{1+x^2}-\sqrt{1-x^2}}{\sqrt{1+x^2}+\sqrt{1-x^2}}\right]=\alpha$ હોય,તો $\sin 2 \alpha$ ની કિંમત શોધો.

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