यदि $\int \frac{1}{(\sin x + 4)(\sin x - 1)} dx = A \frac{1}{\tan \frac{x}{2} - 1} + B \tan^{-1}(f(x)) + C$ है,तो

  • A
    $A = \frac{1}{5}, B = \frac{-2}{5\sqrt{15}}, f(x) = \frac{4\tan x + 3}{\sqrt{15}}$
  • B
    $A = -\frac{1}{5}, B = \frac{1}{\sqrt{15}}, f(x) = \frac{4\tan(\frac{x}{2}) + 1}{\sqrt{15}}$
  • C
    $A = \frac{2}{5}, B = -\frac{2}{5}, f(x) = \frac{4\tan x + 1}{5}$
  • D
    $A = \frac{2}{5}, B = -\frac{2}{5\sqrt{15}}, f(x) = \frac{4\tan \frac{x}{2} + 1}{\sqrt{15}}$

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