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Evaluate the following integrals int(tan...

Evaluate the following integrals `int(tan^2theta+1)/(tan^2theta-1)d theta`

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`int(tan^2theta+1)/(tan^2theta-1)d theta`
put `tantheta=t`
`sec^2theta d theta=dt`
`int(sec^2thetad theta )/(tan^2theta-1)`
`int(dt)/(t^2-1)=(1/2)Inabs(t-1)/(t+1)+C`
`(1/2)Inabs((tantheta-)/(tantheta+1)) +C`
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