यदि $\sin \theta = \frac{3}{5}$ और $\theta$ प्रथम चतुर्थांश में नहीं है,तो $15 \sin 2 \theta - 20 \cos 2 \theta - 7 \tan 2 \theta = $

  • A
    -$4$
  • B
    -$12$
  • C
    $12$
  • D
    $4$

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$\tan \frac{\pi}{8}$ का मान क्या है?

यदि $\tan \alpha = \frac{-12}{5}$,$\cot \beta = \frac{7}{24}$,$\alpha$ दूसरे चतुर्थांश में नहीं है और $\beta$ पहले चतुर्थांश में नहीं है,तो $\sqrt{13} \sin \frac{\alpha}{2} + \cos \frac{\beta}{2} + \tan \frac{\alpha}{2} \cot \frac{\beta}{2} = $

$\cos 15^{\circ} \cos 7.5^{\circ} \sin 7.5^{\circ}$ का मान क्या है?

$\cot\, x + \cot\, (60^\circ + x) + \cot\, (120^\circ + x)$ का मान ज्ञात कीजिए:

$2\sin A\cos^3 A - 2\sin^3 A\cos A = $

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