$\cos ^{-1}\left(\cos \frac{13 \pi}{6}\right)+\tan ^{-1}\left(\tan \frac{7 \pi}{6}\right)=$ . . . . . . .

  • A
    $0$
  • B
    $\frac{\pi}{3}$
  • C
    $\frac{\pi}{6}$
  • D
    $\pi$

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$\tan \left[ \sec^{-1} \sqrt{1 + x^2} \right] = $

$|\sin^{-1}x| = |x|$ ના ઉકેલોની સંખ્યા કેટલી છે?

$\tan ^{-1}(-\sqrt{3})-\sec ^{-1}(-2)=$ . . . . . . .

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