$\sqrt {2 + \sqrt {2 + 2\cos 4\theta } } = $

  • A
    $2\cos \theta $
  • B
    $2\sin \theta $
  • C
    $\cos \theta $
  • D
    $\sin \theta $

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यदि $1+\cos^{2} \theta = 3 \sin \theta \cos \theta$ है,तो $\cot \theta$ का पूर्णांक मान $(0 < \theta < \frac{\pi}{2})$ ज्ञात कीजिए।

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व्यंजक $\frac{\tan 57^{\circ}+\cot 37^{\circ}}{\tan 33^{\circ}+\cot 53^{\circ}}$ का मान किसके बराबर है?

मान लीजिए $A$ और $B$ कथन हैं:
$A: \cos \alpha + \cos \beta + \cos \gamma = 0$
$B: \sin \alpha + \sin \beta + \sin \gamma = 0$
यदि $\cos (\alpha - \beta) + \cos (\beta - \gamma) + \cos (\gamma - \alpha) = -\frac{3}{2}$ है,तो:

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$\cos ^{2} \theta+\sec ^{2} \theta$ का मान हमेशा

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