यदि $\sin 5 \theta = \cos 20^{\circ}$ है,जहाँ $0^{\circ} < \theta < 90^{\circ}$,तो $\theta$ का मान (डिग्री में) क्या है?

  • A
    $4$
  • B
    $22$
  • C
    $10$
  • D
    $14$

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$\cos \frac{\pi }{7} \cos \frac{2\pi }{7} \cos \frac{4\pi }{7} = $

$\cos 1^\circ \cdot \cos 2^\circ \cdot \cos 3^\circ \dots \cos 179^\circ = $

यदि $29 \tan \theta = 31$ है,तो $\frac{1+2 \sin \theta \cos \theta}{1-2 \sin \theta \cos \theta}$ का मान किसके बराबर है?

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यदि $A + B + C = \pi$ है,तो $\tan^2 \frac{A}{2} + \tan^2 \frac{B}{2} + \tan^2 \frac{C}{2}$ हमेशा क्या होगा?

यदि $\sin x + \sin y = 3(\cos y - \cos x)$ है,तो $\frac{\sin 3x}{\sin 3y}$ का मान क्या है?

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