यदि $\alpha = \frac{\sin^3 x}{\cos^2 x}$,$\beta = \frac{\cos^3 x}{\sin^2 x}$ और $\sin x + \cos x = k$ है,तो $\alpha \sin x + \beta \cos x + 3 = $

  • A
    $\frac{2}{(k^2-1)^2}$
  • B
    $\frac{4}{(k^2-1)^2}$
  • C
    $\frac{k^2-1}{2}$
  • D
    $\frac{(k^2-1)^2}{4}$

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