$\int \sin 2x \cos 3x \, dx = $

  • A
    $\frac{1}{2} \left( \cos x + \frac{1}{5} \cos 5x \right) + c$
  • B
    $\frac{1}{2} \left( \cos x - \frac{1}{5} \cos 5x \right) + c$
  • C
    $\cos x + \frac{1}{5} \cos 5x + c$
  • D
    $\cos x - \frac{1}{5} \cos 5x + c$

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