यदि $0 < \theta < 90$ और $\sin \theta = \cos 30$ है,तो $2 \tan^2 \theta - 1 = \dots$

  • A
    $5$
  • B
    $4$
  • C
    $3$
  • D
    $0$

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यदि $\sin \theta + \cos \theta = \sqrt{3}$ है,तो सिद्ध कीजिए कि $\tan \theta + \cot \theta = 1$ है।

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

यदि $\sin \theta + \cos \theta = p$ और $\sec \theta + \operatorname{cosec} \theta = q$ है,तो सिद्ध कीजिए कि $q(p^2 - 1) = 2p$.

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$\frac{\cos ^{2} 40^{\circ}+\cos ^{2} 50^{\circ}}{\sin ^{2} 40^{\circ}+\sin ^{2} 50^{\circ}}=\ldots \ldots \ldots \ldots$

$\Delta ABC$ में, $AC = 5$, $BC = 13$, $m \angle A = 90^\circ$ है, तो $\tan B = \ldots$

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