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

  • A
    $\frac{1}{2}[{\sin ^{ - 1}}({x^2}) + \sqrt {1 - {x^4}} ] + c$
  • B
    $\frac{1}{2}[{\sin ^{ - 1}}({x^2}) + \sqrt {1 - {x^2}} ] + c$
  • C
    ${\sin ^{ - 1}}({x^2}) + \sqrt {1 - {x^4}} + c$
  • D
    ${\sin ^{ - 1}}({x^2}) + \sqrt {1 - {x^2}} + c$

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