intxtan^2xdx...

`intxtan^2xdx`

Text Solution

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`intxtan^2xdx=intx(sec^2x-1)dx`
=`intxsec^2xdx-intxdx`
=`x.tanx-int1.tanxdx-1/2x^2`
[x=1st
`sec^2x=2nd`]
=`xtanx+Inabs(cosx)-x^2/2+C`

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