ત્રિકોણમિતીય સમીકરણ $\sin ^{-1} x = 2 \sin ^{-1} 2a$ નો વાસ્તવિક ઉકેલ મળે, જો

  • A
    $|a| > \frac{1}{\sqrt{2}}$
  • B
    $\frac{1}{2 \sqrt{2}} < |a| < \frac{1}{\sqrt{2}}$
  • C
    $|a| > \frac{1}{2 \sqrt{2}}$
  • D
    $|a| \leq \frac{1}{2 \sqrt{2}}$

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જો $4\sin^{-1}x + \cos^{-1}x = \pi$ હોય,તો $x$ ની કિંમત શોધો.

સમીકરણ $\tan^{-1}(1 + x) + \tan^{-1}(1 - x) = \frac{\pi}{2}$ નો ઉકેલ શોધો.

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