int (1-cosx) /(cos x(1+cos x)) dx...

`int (1-cosx) /(cos x(1+cos x)) dx`

`log |sec x + tan x|-2 tan "" x/2 +C`

`log |sec x - tan x| +C`

`log |tan "" x/2 | + sec x + C`

`log |sec x + tan x|-2 tan x +C`

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INTEGRALS
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