यदि $\tan \beta = \cos \theta \tan \alpha$ है,तो ${\tan ^2}\frac{\theta }{2} = $

  • A
    $\frac{\sin (\alpha + \beta )}{\sin (\alpha - \beta )}$
  • B
    $\frac{\cos (\alpha - \beta )}{\cos (\alpha + \beta )}$
  • C
    $\frac{\sin (\alpha - \beta )}{\sin (\alpha + \beta )}$
  • D
    $\frac{\cos (\alpha + \beta )}{\cos (\alpha - \beta )}$

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Similar Questions

$\theta$ के सभी संभावित मानों की संख्या,जहाँ $0 < \theta < \pi$,जिसके लिए समीकरणों की प्रणाली
$(y+z) \cos 3\theta = (xyz) \sin 3\theta$
$x \sin 3\theta = \frac{2 \cos 3\theta}{y} + \frac{2 \sin 3\theta}{z}$
$(xyz) \sin 3\theta = (y+2z) \cos 3\theta + y \sin 3\theta$
का एक हल $(x_0, y_0, z_0)$ है जहाँ $y_0 z_0 \neq 0$,वह है

यदि $\alpha = \frac{\sin^3 x}{\cos^2 x}$,$\beta = \frac{\cos^3 x}{\sin^2 x}$ और $\sin x + \cos x = k$ है,तो $\alpha \sin x + \beta \cos x + 3 = $

$\cos^2 76^{\circ} + \cos^2 16^{\circ} - \cos 76^{\circ} \cos 16^{\circ}$ का मान ज्ञात कीजिए।

$\left(4 \cos ^2 \frac{\pi}{20}-1\right)\left(4 \cos ^2 \frac{3 \pi}{20}-1\right)\left(4 \cos ^2 \frac{5 \pi}{20}+1\right)\left(4 \cos ^2 \frac{7 \pi}{20}-1\right)\left(4 \cos ^2 \frac{9 \pi}{20}-1\right)=$

यदि $\frac{\sqrt{2} \sin \alpha}{\sqrt{1+\cos 2 \alpha}}=\frac{1}{7}$ और $\sqrt{\frac{1-\cos 2 \beta}{2}}=\frac{1}{\sqrt{10}}$ जहाँ $\alpha, \beta \in (0, \frac{\pi}{2})$,तो $\tan (\alpha+2 \beta)$ का मान ज्ञात कीजिए।

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