જો $\cos^{-1} p + \cos^{-1} q + \cos^{-1} r = \pi$ હોય,તો $p^2 + q^2 + r^2 + 2pqr = $

  • A
    $3$
  • B
    $1$
  • C
    $2$
  • D
    $-1$

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જો $\tan ^{-1}\left(\frac{x}{2}\right)+\tan ^{-1}\left(\frac{y}{2}\right)+\tan ^{-1}\left(\frac{z}{2}\right)=\frac{\pi}{2}$ હોય,તો $x y+y z+z x=$

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

$\frac{d}{dx} \sin^{-1}(3x - 4x^3)$ ની કિંમત શોધો.

$\tan ^{-1}\left(\frac{x}{y}\right)-\tan ^{-1} \left(\frac{x-y}{x+y}\right)$ ની કિંમત શોધો.

જો $\sin ^{-1} x < \cos ^{-1} x$ હોય, તો

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