यदि $\tan 20^{\circ}=\lambda$ है,तो $\frac{\tan 160^{\circ}-\tan 110^{\circ}}{1+\left(\tan 160^{\circ}\right)\left(\tan 110^{\circ}\right)}$ का मान ज्ञात कीजिए।

  • A
    $\frac{1+\lambda^2}{2 \lambda}$
  • B
    $\frac{1+\lambda^2}{\lambda}$
  • C
    $\frac{1-\lambda^2}{\lambda}$
  • D
    $\frac{1-\lambda^2}{2 \lambda}$

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$16 \sin 12^{\circ} \cos 18^{\circ} \sin 48^{\circ} = $

यदि $\cos \left(\frac{\alpha-\beta}{2}\right)=2 \cos \left(\frac{\alpha+\beta}{2}\right)$ है,तो $\tan \frac{\alpha}{2} \tan \frac{\beta}{2}=$

यदि $\cosh \beta = \sec \alpha \cos \theta$ और $\sinh \beta = \operatorname{cosec} \alpha \sin \theta$ है,तो $\sinh^2 \beta =$

$\tan 81^{\circ}-\tan 63^{\circ}-\tan 27^{\circ}+\tan 9^{\circ}$ का मान ज्ञात कीजिए।

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