व्यंजक $1 - \frac{\sin^2 y}{1 + \cos y} + \frac{1 + \cos y}{\sin y} - \frac{\sin y}{1 - \cos y}$ का मान किसके बराबर है?

  • A
    $0$
  • B
    $1$
  • C
    $\sin y$
  • D
    $\cos y$

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