यदि $\alpha = \frac{180^{\circ}}{7}$ है,तो $3 \sin \alpha - 4 \sin^{3} \alpha$ का मान क्या होगा?

  • A
    $\cos 4 \alpha$
  • B
    $\sin 4 \alpha$
  • C
    $\cos 3 \alpha$
  • D
    $0$

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$\cos A \cos 2 A \cos 4 A \ldots \cos 2^{n-1} A$ का मान क्या है?

$\cos ^3 \theta + \cos ^3(120^{\circ} + \theta) + \cos ^3(\theta - 120^{\circ}) = $

$\sqrt{\frac{1 - \sin A}{1 + \sin A}} = $

यदि $\tan \frac{\theta}{2} = t$ है,तो $\frac{1 - t^2}{1 + t^2}$ किसके बराबर है?

यदि $540^{\circ} < \theta < 630^{\circ}$ और $\tan \theta = \frac{5}{12}$ है,तो $\frac{\cos \frac{\theta}{2} - 5 \sin \frac{\theta}{2}}{\sqrt{-(12 \sec \theta + 5 \operatorname{cosec} \theta)}} = $

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