समीकरण $ax + by^2 = \cos y$ के लिए $\frac{dy}{dx}$ ज्ञात कीजिए।

  • A
    $\frac{-a}{2by + \sin y}$
  • B
    $\frac{a}{2by + \sin y}$
  • C
    $\frac{-a}{2by - \sin y}$
  • D
    $\frac{a}{2by - \sin y}$

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