यदि $7 \sin^{2} \theta + 3 \cos^{2} \theta = 4$ है,तो $\tan \theta$ का मान ज्ञात कीजिए (जहाँ $\theta$ न्यूनकोण है)।

  • A
    $1/\sqrt{2}$
  • B
    $1$
  • C
    $\sqrt{3}$
  • D
    $1/\sqrt{3}$

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$\cos 15^\circ - \sin 15^\circ$ का मान किसके बराबर है?

यदि $\sqrt x + \frac{1}{{\sqrt x }} = 2\cos \theta$ है,तो ${x^6} + {x^{ - 6}} = $

यदि $\sin \theta + \sin \phi = a$ और $\cos \theta + \cos \phi = b$ है,तो $\tan \frac{\theta - \phi}{2}$ का मान ज्ञात कीजिए।

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