यदि $\cos 9 \alpha = \sin \alpha$ और $9 \alpha < 90^{\circ}$ है,तो $\tan 5 \alpha$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{\sqrt{3}}$
  • B
    $\sqrt{3}$
  • C
    $1$
  • D
    $0$

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यदि $3 \cot \theta = 4$ है,तो $\frac{1 - \tan^2 \theta}{1 + \tan^2 \theta} = \dots$ ज्ञात कीजिए।

$\sin \theta \cdot \cos (90^\circ - \theta) = \ldots \ldots \ldots$

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

$\Delta ABC$ में,$m\angle A = 90^\circ$,$AB = 5$,$AC = 12$ और $BC = 13$ है। अतः,$\sin C + \cos C = \ldots$

$\frac{\sin 60^{\circ} + \cos 30^{\circ}}{1 + \sin 30^{\circ} + \cos 60^{\circ}} = \dots$

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