निम्नलिखित का मूल्यांकन कीजिए:
$\frac{\cos 45^{\circ}}{\sec 30^{\circ}+\operatorname{cosec} 30^{\circ}}$

  • A
    $\frac{3\sqrt{2}-\sqrt{6}}{8}$
  • B
    $\frac{\sqrt{6}-\sqrt{2}}{8}$
  • C
    $\frac{3\sqrt{2}+\sqrt{6}}{8}$
  • D
    $\frac{\sqrt{6}+\sqrt{2}}{8}$

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मान ज्ञात कीजिए:
$\frac{\sin ^{2} 63^{\circ}+\sin ^{2} 27^{\circ}}{\cos ^{2} 17^{\circ}+\cos ^{2} 73^{\circ}}$

यदि $\operatorname{cosec} \theta = \frac{2}{\sqrt{3}}$ है,तो $\theta = \ldots$ ($^\circ$ में)

$\Delta ABC$ में,$m\angle B = 90^\circ$,$m\angle C = 30^\circ$ और $AC = 30 \text{ cm}$ है,तो $AB = \ldots \text{ cm}$.

$0 < \theta < 90$ और $\sec \theta = \operatorname{cosec} 60^\circ$ है,तो $2 \cos^2 \theta - 1$ का मान ........ है।

$\Delta ABC$ में,$\angle B$ एक समकोण है। यदि $AC = 16$ और $BC = 8$ है,तो $m \angle C = \dots$ ($^{\circ}$ में)

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