જો $\tan^{-1} 2x + \tan^{-1} 3x = \frac{\pi}{4}$ હોય,તો $x =$

  • A
    $-1$
  • B
    $\frac{1}{6}$
  • C
    $-1, \frac{1}{6}$
  • D
    આમાંથી કોઈ નહીં

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$\tan ^{-1}\left[\frac{1}{\sqrt{3}} \sin \frac{5 \pi}{2}\right] + \sin ^{-1}\left[\cos \left(\sin ^{-1} \frac{\sqrt{3}}{2}\right)\right]$ ની કિંમત શોધો.

જો કોઈ $x \in (-1, 1)$ માટે $\sin^{-1} x = \frac{\pi}{5}$ હોય,તો $\cos^{-1} x$ ની કિંમત શોધો.

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