$\int \sqrt{\frac{a+x}{a-x}} \, dx = $

  • A
    $a \cos^{-1}(x/a) + \sqrt{a^2-x^2} + c$
  • B
    $a \cos^{-1}(x/a) - \sqrt{a^2-x^2} + c$
  • C
    $-a \cos^{-1}(x/a) + \sqrt{a^2-x^2} + c$
  • D
    $-a \cos^{-1}(x/a) - \sqrt{a^2-x^2} + c$

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