यदि $\int \frac{\cos 4x + 1}{\cot x - \tan x} dx = k \cos 4x + c$ है,तो $k$ का मान ज्ञात कीजिए।

  • A
    $\frac{-1}{2}$
  • B
    $\frac{-1}{8}$
  • C
    $\frac{-1}{3}$
  • D
    $\frac{-1}{5}$

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