If $\sec \theta + \tan \theta = p,$ then $\tan \theta $ is equal to

  • A

    $\frac{{2p}}{{{p^2} - 1}}$

  • B

    $\frac{{{p^2} - 1}}{{2p}}$

  • C

    $\frac{{{p^2} + 1}}{{2p}}$

  • D

    $\frac{{2p}}{{{p^2} + 1}}$

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