$\int x \cos^2 x \, dx = $

  • A
    $\frac{x^2}{4} - \frac{1}{4}x \sin 2x - \frac{1}{8} \cos 2x + c$
  • B
    $\frac{x^2}{4} + \frac{1}{4}x \sin 2x + \frac{1}{8} \cos 2x + c$
  • C
    $\frac{x^2}{4} - \frac{1}{4}x \sin 2x + \frac{1}{8} \cos 2x + c$
  • D
    $\frac{x^2}{4} + \frac{1}{4}x \sin 2x - \frac{1}{8} \cos 2x + c$

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