यदि $A + B + C = 180^\circ$ है,तो $\sum \tan \frac{A}{2} \tan \frac{B}{2} = $

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $3$

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Similar Questions

$0^{\circ} < \theta < 90^{\circ}$ के लिए निम्नलिखित में से कौन सा संबंध सही है?

$\frac{\sin 3\theta + \sin 5\theta + \sin 7\theta + \sin 9\theta}{\cos 3\theta + \cos 5\theta + \cos 7\theta + \cos 9\theta} = $

यदि $\tan \beta = \cos \theta \tan \alpha$ है,तो ${\tan ^2}\frac{\theta }{2} = $

यदि $\sin \theta = -\frac{7}{25}$ और $\theta$ तीसरे चतुर्थांश में है,तो $\frac{7 \cot \theta - 24 \tan \theta}{7 \cot \theta + 24 \tan \theta} = $

$\cot(7.5^{\circ}) + \tan(67.5^{\circ}) - \cot(67.5^{\circ}) - \tan(7.5^{\circ})$ का मान क्या है?

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