$\int \frac{1-\cos x}{\cos x(1+\cos x)} d x=$

  • A
    $\log |\sec x+\tan x|-2(\sec x-\tan x)+C$
  • B
    $\log |\sec x+\tan x|-2(\operatorname{cosec} x-\cot x)+C$
  • C
    $\log |\sec x+\tan x|+2(\operatorname{cosec} x-\cot x)+C$
  • D
    $\log |\sec x+\tan x|+2(\operatorname{cosec} x+\cot x)+C$

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