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

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

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`int ((1+cosx)/(1-cosx)) dx`
`I=int ((1+cosx)/(1-cosx)) dx`
`I=int ((1+cosx)(1+cosx))/((1-cosx)(1+cosx)) dx`
`I=int ((1+cosx)^2)/(1-cos^2x) dx`
`I=int((1+cos^2x+2cosx)/sin^2x)dx`
`I=int(1/sin^2x)dx+intcos^2x/sin^2xdx+int(2cosx)/sin^2xdx`
`I=intcosec^2xdx+intcot^2xdx+2intcosecxcotxdx`
`I=intcosec^2xdx+int(cosec^2x−1)dx+2intcosecxcotxdx`
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