यदि $\tan ^{-1} x+\tan ^{-1} y+\tan ^{-1} z=\frac{\pi}{2}$ है,तो $1-x y-y z-z x$ का मान ज्ञात कीजिए।

  • A
    $1$
  • B
    $0$
  • C
    $-1$
  • D
    $2$

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$\cot^{-1} \frac{3}{4} + \sin^{-1} \frac{5}{13} = $

यदि $y = \sec^{-1}\left(\frac{1}{2x^2 - 1}\right)$ है,तो $\frac{dy}{dx}$ ज्ञात कीजिए,जहाँ $0 < x < \frac{1}{\sqrt{2}}$.

यदि $|x|>1$ के लिए,$\tanh ^{-1}\left(\frac{1}{x}\right)+\operatorname{coth}^{-1}(x)=\log _e(f(x))$ है,तो $f(-5)=$

$x > 0$ के लिए $\tan ^{-1} \frac{1-x}{1+x}=\frac{1}{2} \tan ^{-1} x$ को हल करें।

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यदि $x = {\sin ^{ - 1}}(\sin 10)$ और $y = {\cos ^{ - 1}}(\cos 10)$ है,तो $y - x$ का मान ज्ञात कीजिए।

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