यदि $\theta$ का अस्तित्व इस प्रकार है कि $a > |\sec \theta|$,तो $\int \frac{dx}{1+a \cos x} = $

  • A
    $\frac{2}{\sqrt{a^2-1}} \tan ^{-1}\left(\sqrt{\frac{a-1}{a+1}} \tan \frac{x}{2}\right)+C$
  • B
    $\frac{2}{\sqrt{a^2-1}} \tanh ^{-1}\left(\sqrt{\frac{a-1}{a+1}} \tan \frac{x}{2}\right)+C$
  • C
    $\frac{1}{\sqrt{a^2-1}} \log \left(\frac{\sqrt{a+1} \cos \frac{x}{2}-\sqrt{a-1} \sin \frac{x}{2}}{\sqrt{a-1} \cos \frac{x}{2}+\sqrt{a-1} \sin \frac{x}{2}}\right)+C$
  • D
    $\frac{1}{\sqrt{a^2-1}} \log \left(\frac{\sqrt{a+1} \cos \frac{x}{2}+\sqrt{a-1} \sin \frac{x}{2}}{\sqrt{a+1} \cos \frac{x}{2}-\sqrt{a-1} \sin \frac{x}{2}}\right)+C$

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