$\operatorname{Sech}^{-1}(\sin \alpha) =$

  • A
    $\log \left(\sin \alpha + \sqrt{\sin^2 \alpha - 1}\right)$
  • B
    $\log (\tan \alpha + 1)$
  • C
    $\log \left(\cot \frac{\alpha}{2}\right)$
  • D
    $\log \left(\frac{1 + \tan \alpha}{2 \sin \alpha}\right)$

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Similar Questions

$\cot \frac{\pi}{16} \cdot \cot \frac{2 \pi}{16} \cdot \cot \frac{3 \pi}{16} \cdot \cot \frac{4 \pi}{16} \cdot \cot \frac{5 \pi}{16} \cdot \cot \frac{6 \pi}{16} \cdot \cot \frac{7 \pi}{16} = $

सिद्ध कीजिए कि $\cot x \cot 2x - \cot 2x \cot 3x - \cot 3x \cot x = 1$ है।

जब $\theta = \frac{\pi}{15}$ है,तो $(1-\cos \theta)(1+\cos \theta)(1+\cot^2 \theta)$ का मान क्या होगा?

यदि $\cos(\theta_1) + \cos(\theta_2) + \cos(\theta_3) + \cos(\theta_4) = -4$ है,तो $\cot(\frac{\theta_1}{2}) + \cot(\frac{\theta_2}{2}) + \cot(\frac{\theta_3}{2}) + \cot(\frac{\theta_4}{2})$ का मान ज्ञात कीजिए।

यदि $y^2+z^2=3yz$,$z^2+x^2=8zx$,और $x^2+y^2=4xy$ है,तो $\frac{y^2}{xz}+\frac{xz}{y^2}$ का मान ज्ञात कीजिए।

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