यदि $0 < t < \frac{\pi}{2}$ के लिए $f(t) = \frac{1 + \operatorname{cosec} t}{1 - \operatorname{cosec} t}$ और $f^{\prime}(t) = f(t) g(t)$ है,तो $g(t) =$

  • A
    $-4 \operatorname{cosec} 2t$
  • B
    $4 \operatorname{cosec} 2t$
  • C
    $2 \sin 2t$
  • D
    $4 \operatorname{cosec} t$

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