जब $\frac{\sin 9 \theta}{\cos 27 \theta}+\frac{\sin 3 \theta}{\cos 9 \theta}+\frac{\sin \theta}{\cos 3 \theta}=k(\tan 27 \theta-\tan \theta)$ परिभाषित है,तब $k=$

  • A
    $\frac{\pi}{2}$
  • B
    $-\frac{1}{2}$
  • C
    $\frac{1}{2}$
  • D
    $\frac{\pi}{4}$

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यदि $\tan^2 \alpha \tan^2 \beta + \tan^2 \beta \tan^2 \gamma + \tan^2 \gamma \tan^2 \alpha + 2\tan^2 \alpha \tan^2 \beta \tan^2 \gamma = 1$ है,तो $\sin^2 \alpha + \sin^2 \beta + \sin^2 \gamma$ का मान क्या है?

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यदि $\sin 2\theta + \sin 2\phi = 1/2$ और $\cos 2\theta + \cos 2\phi = 3/2$ है,तो $\cos^2(\theta - \phi) = $

$\cos 13^{\circ} \sin 17^{\circ} \sin 21^{\circ} \cos 47^{\circ} = $

सभी संभावित त्रिकों $(a_1, a_2, a_3)$ की संख्या ज्ञात कीजिए ताकि सभी $x$ के लिए $a_1 + a_2 \cos 2x + a_3 \sin^2 x = 0$ हो।

यदि $\cos \theta = -\frac{\sqrt{3}}{2}$ और $\sin \alpha = -\frac{3}{5}$ है,जहाँ $\theta$ तीसरे चतुर्थांश में नहीं है,तो $\frac{2 \tan \alpha + \sqrt{3} \tan \theta}{\cot^2 \theta + \cos \alpha}$ का मान ज्ञात कीजिए।

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