$\frac{\sin^2 A - \sin^2 B}{\sin A \cos A - \sin B \cos B} = $

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

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यदि $\pi < \alpha < \frac{3\pi}{2}$ है,तो $\sqrt{\frac{1 - \cos \alpha}{1 + \cos \alpha}} + \sqrt{\frac{1 + \cos \alpha}{1 - \cos \alpha}} = $

$\frac{\tan ^{2} \theta}{\sec \theta+1}-\sec \theta$ का मान ज्ञात कीजिए।

$\sin (\beta + \gamma - \alpha ) + \sin (\gamma + \alpha - \beta ) + \sin (\alpha + \beta - \gamma ) - \sin (\alpha + \beta + \gamma ) = $

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$\sin 12^\circ \sin 24^\circ \sin 48^\circ \sin 84^\circ = $

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