यदि $\tan \alpha = \frac{m}{m + 1}$ और $\tan \beta = \frac{1}{2m + 1}$ है,तो $\alpha + \beta = $

  • A
    $\frac{\pi}{3}$
  • B
    $\frac{\pi}{4}$
  • C
    $\frac{\pi}{6}$
  • D
    इनमें से कोई नहीं

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यदि $A=35^{\circ}, B=15^{\circ}$ और $C=40^{\circ}$ है,तो $\tan A \cdot \tan B+\tan B \cdot \tan C+\tan C \cdot \tan A$ का मान ज्ञात कीजिए।

सिद्ध कीजिए कि $\frac{\sin x-\sin y}{\cos x+\cos y}=\tan \left(\frac{x-y}{2}\right)$

सिद्ध कीजिए कि: $2 \cos \frac{\pi}{13} \cos \frac{9 \pi}{13} + \cos \frac{3 \pi}{13} + \cos \frac{5 \pi}{13} = 0$

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यदि $\tan \theta = \frac{\cos 25^{\circ} + \sin 25^{\circ}}{\cos 25^{\circ} - \sin 25^{\circ}}$ और $\theta$ तीसरे चतुर्थांश में है,तो $\theta =$ ($^{\circ}$ में)

यदि $m \tan (\theta - 30^\circ) = n \tan (\theta + 120^\circ)$ है,तो $\frac{m + n}{m - n} = $

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