यदि $y = \tan^{-1} \frac{x}{1+2x^2} + \tan^{-1} \frac{x}{1+6x^2} + \tan^{-1} \frac{x}{1+12x^2}$ है,तो $\left(\frac{dy}{dx}\right)_{x=\frac{1}{2}} = $

  • A
    $1$
  • B
    $-1$
  • C
    $0$
  • D
    $\frac{1}{2}$

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यदि $0 < x < 1$ है,तो $\cot ^{-1}\left( \frac{2x^2 - 1}{2x\sqrt{1 - x^2}} \right)$ का मान ज्ञात कीजिए।

यदि $\sin^{-1}(1 - x) - 2\sin^{-1}x = \pi/2$ है,तो $x$ का मान ज्ञात कीजिए:

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

$\triangle ABC$ में, यदि $\angle C = \frac{\pi}{2}$ है, तो $\tan^{-1}\left(\frac{a}{b+c}\right) + \tan^{-1}\left(\frac{b}{c+a}\right) + \tan^{-1}\left(\frac{c}{a+b}\right) =$

यदि $\sin ^{-1}\left(\frac{3}{5}\right)+\cos ^{-1}\left(\frac{12}{13}\right)=\sin ^{-1} \alpha$ है,तो $\alpha=$

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