$\int \frac{\sqrt{\cos 2 x}}{\sin x} d x=$

  • A
    $\frac{1}{2 \sqrt{2}} \log \left|\frac{\sqrt{2}+\sqrt{1-\tan ^2 x}}{\sqrt{2}-\sqrt{1-\tan ^2 x}}\right|-\frac{1}{2} \log \left|\frac{1-\sqrt{1-\tan ^2 x}}{1+\sqrt{1-\tan ^2 x}}\right|+c$
  • B
    $\frac{1}{\sqrt{2}} \log \left|\frac{\sqrt{2}+\sqrt{1-\tan ^2 x}}{\sqrt{2}-\sqrt{1-\tan ^2 x}}\right|-\frac{1}{2} \log \left|\frac{1+\sqrt{1-\tan ^2 x}}{1-\sqrt{1-\tan ^2 x}}\right|+c$
  • C
    $\frac{1}{4 \sqrt{2}} \log \left|\frac{\sqrt{2}-\sqrt{1-\tan ^2 x}}{\sqrt{2}+\sqrt{1-\tan ^2 x}}\right|+\frac{1}{2} \log \left|\frac{1-\sqrt{1-\tan ^2 x}}{1+\sqrt{1-\tan ^2 x}}\right|+c$
  • D
    $\frac{1}{4 \sqrt{2}} \log \left|\frac{2-\sqrt{1-\tan ^2 x}}{2+\sqrt{1-\tan ^2 x}}\right|+\frac{1}{2 \sqrt{2}} \log \left|\frac{1-\sqrt{1-\tan ^2 x}}{1+\sqrt{1-\tan ^2 x}}\right|+c$

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Difficult
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$\int \frac{dx}{2+\cos x} = $ (जहाँ $C$ समाकलन का एक स्थिरांक है।)

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