यदि $\theta$ एक न्यून कोण है और $\tan(4\theta - 50^{\circ}) = \cot(50^{\circ} - \theta)$ है,तो $\theta$ का मान डिग्री में क्या है?

  • A
    $30$
  • B
    $40$
  • C
    $20$
  • D
    $50$

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$\sec ^{2} \theta - \frac{\sin ^{2} \theta - 2 \sin ^{4} \theta}{2 \cos ^{4} \theta - \cos ^{2} \theta}$ का मान ज्ञात कीजिए।

$\frac{{\cos 12^\circ - \sin 12^\circ }}{{\cos 12^\circ + \sin 12^\circ }} + \frac{{\sin 147^\circ }}{{\cos 147^\circ }} = $

दिया गया है कि $\pi < \alpha < \frac{3\pi}{2},$ तो व्यंजक $\sqrt{4\sin^4 \alpha + \sin^2 2\alpha} + 4\cos^2 \left( \frac{\pi}{4} - \frac{\alpha}{2} \right)$ का मान ज्ञात कीजिए।

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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) = $

$\frac{\tan 70^\circ - \tan 20^\circ}{\tan 50^\circ}$ का मान ज्ञात कीजिए।

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