यदि $\tan ^{-1} x + \tan ^{-1} y + \tan ^{-1} z = \frac{\pi}{2}$,जहाँ $x, y, z > 0$ और $xy < 1$ है,तो $xy + yz + zx$ का मान ज्ञात कीजिए:

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

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Similar Questions

यदि $\tan ^{-1}\left[\frac{1}{1+1 \cdot 2}\right]+\tan ^{-1}\left[\frac{1}{1+2 \cdot 3}\right]+\cdots+\tan ^{-1}\left[\frac{1}{1+n(n+1)}\right]=\tan ^{-1}[x]$ है,तो $x=$

यदि $\frac{a}{b} \tan x > -1$ है,तो $\tan ^{-1}\left[\frac{a \cos x-b \sin x}{b \cos x+a \sin x}\right]$ को सरल कीजिए।

यदि $0 < |x| < \sqrt 2$ के लिए ${\sin ^{ - 1}}\left( {x - \frac{{{x^2}}}{2} + \frac{{{x^3}}}{4} - \dots} \right) + {\cos ^{ - 1}}\left( {{x^2} - \frac{{{x^4}}}{2} + \frac{{{x^6}}}{4} - \dots} \right) = \frac{\pi }{2}$ है,तो $x$ का मान ज्ञात कीजिए।

मान ज्ञात कीजिए: $\tan^{-1} \left( \frac{1 - x^2}{2x} \right) + \cos^{-1} \left( \frac{1 - x^2}{1 + x^2} \right)$

$2 \cot ^{-1} \frac{1}{2} - \cot ^{-1} \frac{4}{3}$ का मान है

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