$\cot \theta - \tan \theta - 2 \tan 2 \theta - 4 \tan 4 \theta = $

  • A
    $8 \cot 8 \theta$
  • B
    $\cot 8 \theta + \tan 3 \theta$
  • C
    $\cot 8 \theta + \cot 6 \theta$
  • D
    $4 \cot 8 \theta - \tan 6 \theta$

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