यदि $\sec \theta + \tan \theta = 2/3$ है,तो $\theta$ किस चतुर्थांश में स्थित है?

  • A
    $I$
  • B
    $II$
  • C
    $III$
  • D
    $IV$

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यदि $3 \sin \alpha = 5 \sin \beta$ है,तो $\tan \left(\frac{\alpha + \beta}{2}\right) \div \tan \left(\frac{\alpha - \beta}{2}\right) = $

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$\sinh (x+y) \cosh (x-y)$ किसके बराबर है?

यदि $\tan 15^{\circ}+\frac{1}{\tan 75^{\circ}}+\frac{1}{\tan 105^{\circ}}+\tan 195^{\circ}=2a$ है,तो $\left(a+\frac{1}{a}\right)$ का मान ज्ञात कीजिए:

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