$0 < x \leq \pi$ के लिए, $\sinh ^{-1}(\cot x)$ का मान क्या होगा?

  • A
    $\log \left(\cot \frac{x}{2}\right)$
  • B
    $\log \left(\tan \frac{x}{2}\right)$
  • C
    $\log (1+\cot x)$
  • D
    $\log (1+\tan x)$

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$\cos 13^{\circ} \sin 17^{\circ} \sin 21^{\circ} \cos 47^{\circ} = $

श्रेणी $\cos 12^{\circ} + \cos 84^{\circ} + \cos 132^{\circ} + \cos 156^{\circ}$ का मान है

$\frac{\cos 15^{\circ} \cos^2 22\frac{1}{2}^{\circ} - \sin 75^{\circ} \sin^2 52\frac{1}{2}^{\circ}}{\cos^2 15^{\circ} - \cos^2 75^{\circ}} = $

यदि $\sin A + \sin B = \frac{1}{2}$ और $\cos A + \cos B = 1$ है,तो $\sin \left(\frac{A-B}{2}\right)$ का मान ज्ञात कीजिए।

यदि $x = \log \left[ \cot \left( \frac{\pi}{4} + \theta \right) \right]$ है, तो $\sinh x$ का मान क्या है?

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