જો $(\cos ^{-1} x)^2-(\sin ^{-1} x)^2 > 0$ હોય,તો

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

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જો $\sin \left(\sin ^{-1} \frac{1}{5}+\cos ^{-1} x\right)=1$ હોય,તો $x$ ની કિંમત શોધો.

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