यदि $x_1, x_2, x_3$ समीकरण $x^3 - x^2 \tan \theta + x \tan^2 \theta + \tan \theta = 0$ के मूल हैं और $0 < \theta < \frac{\pi}{4}$ है, तो $\theta = \frac{\pi}{12}$ पर $\tan^{-1} x_1 + \tan^{-1} x_2 + \tan^{-1} x_3$ का मान क्या होगा?

  • A
    $\frac{\pi}{6}$
  • B
    $\frac{\pi}{4}$
  • C
    $\frac{\pi}{3}$
  • D
    $\frac{\pi}{2}$

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यदि त्रिभुज $ABC$ में $\angle A = 90^\circ$ है,तो $\tan^{-1}\left(\frac{c}{a+b}\right) + \tan^{-1}\left(\frac{b}{a+c}\right) = $

यदि $3 \sin ^{-1}\left(\frac{2 x}{1+x^2}\right)-4 \cos ^{-1}\left(\frac{1-x^2}{1+x^2}\right)+2 \tan ^{-1}\left(\frac{2 x}{1-x^2}\right)=\frac{\pi}{3}$ है,तो $x$ का मान ज्ञात कीजिए।

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