$\int \frac{\cos 2 x \cdot \sin 4 x}{\cos ^4 x\left(1+\cos ^2 2 x\right)} d x=$

  • A
    $\log \left[\frac{1+\cos ^2 2 x}{1+\cos 2 x}\right]-\tan ^2 x+c$
  • B
    $\log \left(\frac{1+\cos ^2 2 x}{1+\cos 2 x}\right)+\tan ^2 x+c$
  • C
    $\log \left(\frac{1+\cos 2 x}{1+\cos ^2 2 x}\right)+\sec ^2 x+c$
  • D
    $\log \left(\frac{(1+\cos 2 x)^2}{1+\cos ^2 2 x}\right)+\sec ^2 x+c$

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