$\int \frac{1}{3 \cos x - 4 \sin x + 5} dx = $

  • A
    $\frac{2}{\sqrt{5}} \tan^{-1}\left(\frac{3 \tan \frac{x}{2} + 4}{\sqrt{5}}\right) + c$
  • B
    $\frac{3}{4} \tan^{-1}\left(\frac{\tan \frac{x}{2}}{3}\right) + c$
  • C
    $\frac{1}{2 - \tan \frac{x}{2}} + c$
  • D
    $\frac{1}{1 + \tan \frac{x}{2}} + c$

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