$\int_0^{\frac{\pi}{2}} \frac{\cos x \, dx}{\sqrt{1+\cos x \sin x}} = $

  • A
    $\sqrt{2} \cos ^{-1}\left(\frac{1}{\sqrt{3}}\right)$
  • B
    $\frac{1}{\sqrt{2}} \sin ^{-1}\left(\frac{1}{\sqrt{3}}\right)$
  • C
    $\sqrt{2} \sin ^{-1}\left(\frac{1}{\sqrt{3}}\right)$
  • D
    $\sqrt{2} \sin ^{-1}(\sqrt{3})$

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