If $\operatorname{cosec} \theta + \cot \theta = p,$ then $\cos \theta =$

  • A
    $\frac{p^{2} + 1}{p^{2} - 1}$
  • B
    $\frac{1 + p^{2}}{1 - p^{2}}$
  • C
    $\frac{p^{2} - 1}{p^{2} + 1}$
  • D
    $\frac{1 - p^{2}}{1 + p^{2}}$

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