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

  • A
    $-1$
  • B
    $\frac{1}{3}$
  • C
    $\frac{1}{6}$
  • D
    $\frac{1}{2}$

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જો $\tan ^{-1} x+\tan ^{-1} y+\tan ^{-1} z=\frac{\pi}{2}$ હોય, તો $1-x y-y z-z x$ ની કિંમત શોધો.

જો $\theta = \sec^{-1}(\cosh u)$ હોય,તો $u =$

જો $y = \tan^{-1}\left( \frac{\sqrt{a} - \sqrt{x}}{1 + \sqrt{ax}} \right)$ હોય,તો $\frac{dy}{dx} = $

$\tan ^{-1} 2 + \cot ^{-1}(-3) + \cot ^{-1} \frac{1}{3} + \tan ^{-1}\left(-\frac{1}{2}\right) = $

જો $3 \sin^{-1}(\frac{2x}{1+x^2}) - 4 \cos^{-1}(\frac{1-x^2}{1+x^2}) + 2 \tan^{-1}(\frac{2x}{1-x^2}) = \frac{\pi}{3}$ હોય, તો $x$ ની કિંમત શોધો.

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