જો $90^{\circ} < \alpha < 180^{\circ}$,$\sin \alpha = \frac{\sqrt{3}}{2}$ અને $180^{\circ} < \beta < 270^{\circ}$,$\sin \beta = -\frac{\sqrt{3}}{2}$ હોય,તો $\frac{4 \sin \alpha - 3 \tan \beta}{\tan \alpha + \sin \beta} = $

  • A
    $\frac{2}{3}$
  • B
    $0$
  • C
    $-\frac{2}{3}$
  • D
    આમાંથી કોઈ નહીં

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$\cos \frac{\pi}{10} \cos \frac{2\pi}{10} \cos \frac{4\pi}{10} \cos \frac{8\pi}{10} \cos \frac{16\pi}{10}$ નું મૂલ્ય શું છે?

$\tan \left( \frac{\pi }{4} + \theta \right) - \tan \left( \frac{\pi }{4} - \theta \right) = $

$2\sin^2 \beta + 4\cos(\alpha + \beta)\sin \alpha \sin \beta + \cos 2(\alpha + \beta) = $

જો $\tan A = \frac{1 - \cos B}{\sin B}$ હોય,તો $\tan B$ ના સ્વરૂપમાં $\tan 2A$ શોધો અને દર્શાવો કે:

$\frac{1 + \sin A - \cos A}{1 + \sin A + \cos A} = $

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