$\Delta ABC$ में,$m \angle C = 90^{\circ}$ और $\cos B = \frac{1}{2}$ है,तो $\operatorname{cosec} A = \ldots$

  • A
    $\frac{1}{2}$
  • B
    $\sqrt{3}$
  • C
    $\frac{2}{\sqrt{3}}$
  • D
    $2$

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Similar Questions

$(\sin 80^{\circ} + \cos 10^{\circ})(\sin 80^{\circ} - \cos 10^{\circ}) = \ldots \ldots \ldots$

यदि $5 \theta$ एक न्यून कोण का माप है और $\cos \theta = \sin 5 \theta$ है,तो $\theta$ का मान $\ldots \ldots \ldots \ldots$ है। ($^{\circ}$ में)

$\sin ^{2} 1^{\circ} + \sin ^{2} 3^{\circ} + \sin ^{2} 87^{\circ} + \sin ^{2} 89^{\circ} = \ldots$

$(1-\cos \theta)(1+\cos \theta) = \dots$

सिद्ध कीजिए कि $\tan ^{4} \theta+\tan ^{2} \theta=\sec ^{4} \theta-\sec ^{2} \theta$

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