$\frac{\tan A}{1-\cot A} + \frac{\cot A}{1-\tan A} = ?$

  • A
    $1 + \sec A \operatorname{cosec} A$
  • B
    $\tan A + \cot A$
  • C
    $1 + \tan A + \cot A$
  • D
    $\sec A + \operatorname{cosec} A + 1$

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