જો $\alpha$ બીજા ચરણમાં હોય,તો $\sqrt{\frac{1-\sin \alpha}{1+\sin \alpha}}-\sqrt{\frac{1+\sin \alpha}{1-\sin \alpha}}=$

  • A
    $2 \tan \alpha$
  • B
    $-2 \tan \alpha$
  • C
    $2 \cot \alpha$
  • D
    $-2 \cot \alpha$

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