જો $x = \sec \phi - \tan \phi$ અને $y = \csc \phi + \cot \phi$ હોય,તો:

  • A
    $x = \frac{y + 1}{y - 1}$
  • B
    $x = \frac{y - 1}{y + 1}$
  • C
    $y = \frac{1 - x}{1 + x}$
  • D
    આમાંથી કોઈ નહીં

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