$\int \frac{dx}{(1 + x^2)\sqrt{1 - x^2}} = $

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

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