ધારો કે $\tan ^{-1} y = \tan ^{-1} x + \tan ^{-1} \left( \frac{2x}{1 - x^2} \right)$,જ્યાં $|x| < \frac{1}{\sqrt{3}}$,તો $y$ ની એક કિંમત શું છે?

  • A
    $\frac{3x + x^3}{1 + 3x^2}$
  • B
    $\frac{3x - x^3}{1 + 3x^2}$
  • C
    $\frac{3x + x^3}{1 - 3x^2}$
  • D
    $\frac{3x - x^3}{1 - 3x^2}$

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જો $x>0, y>0, z>0, xy+yz+zx < 1$ અને જો $\tan^{-1} x + \tan^{-1} y + \tan^{-1} z = \pi$ હોય,તો $x+y+z$ ની કિંમત શું થાય?

જો $y=\tan ^{-1}\left(\frac{3 x-x^3}{1-3 x^2}\right)+\tan ^{-1}\left(\frac{4 x-4 x^3}{1-6 x^2+x^4}\right)$ હોય,તો $\frac{d y}{d x}$ ની કિંમત શું થાય?

$2 \tan ^{-1}\left(\frac{1}{3}\right)-\tan ^{-1}\left(\frac{3}{4}\right)=$

$\cot ^{ - 1}\left[ \frac{\sqrt {1 - \sin x} + \sqrt {1 + \sin x}}{\sqrt {1 - \sin x} - \sqrt {1 + \sin x}} \right] = $

જો $2 \sin^{-1} x = \sin^{-1}(2x \sqrt{1-x^2})$ હોય,તો $x \in$ . . . . . . .

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