यदि $2\tan A = 3\tan B$ है,तो $\frac{\sin 2B}{5 - \cos 2B}$ का मान क्या होगा?

  • A
    $\tan A - \tan B$
  • B
    $\tan (A - B)$
  • C
    $\tan (A + B)$
  • D
    $\tan (A + 2B)$

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$\frac{{\tan A + \sec A - 1}}{{\tan A - \sec A + 1}} = $

मान लीजिए $\alpha, \beta$ इस प्रकार हैं कि $\pi < (\alpha - \beta) < 3\pi$ है। यदि $\sin \alpha + \sin \beta = -\frac{21}{65}$ और $\cos \alpha + \cos \beta = -\frac{27}{65}$ है,तो $\cos \frac{\alpha - \beta}{2}$ का मान क्या है?

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$\frac{4 \sin 9^{\circ} \sin 21^{\circ} \sin 39^{\circ} \sin 51^{\circ} \sin 69^{\circ} \sin 81^{\circ}}{\sin 54^{\circ}}$ का मान ज्ञात कीजिए।

यदि $\alpha$ दूसरे चतुर्थांश में स्थित है,तो $\sqrt{\frac{1-\sin \alpha}{1+\sin \alpha}}-\sqrt{\frac{1+\sin \alpha}{1-\sin \alpha}}=$

मान लीजिए $A = \{ \theta : 2\cos^2 \theta + \sin \theta \le 2 \}$ और $B = \{ \theta : \frac{\pi}{2} \le \theta \le \frac{3\pi}{2} \}$,तो $A \cap B$ है

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