$\int \frac{d x}{9 \cos ^2 2 x+16 \sin ^2 2 x}=$

  • A
    $\frac{1}{25} \tan ^{-1}\left(\frac{3}{4} \tan 2 x\right)+c$
  • B
    $\frac{1}{25} \tan ^{-1}\left(\frac{4}{3} \tan 2 x\right)+c$
  • C
    $\frac{1}{24} \tan ^{-1}\left(\frac{3}{4} \tan 2 x\right)+c$
  • D
    $\frac{1}{24} \tan ^{-1}\left(\frac{4}{3} \tan 2 x\right)+c$

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