यदि $\operatorname{cosec}^{2} \theta = \frac{4xy}{(x+y)^{2}}$ है,तो

  • A
    $x = -y$
  • B
    $x = \frac{1}{y}$
  • C
    $x = y$
  • D
    इनमें से कोई नहीं

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