1.

intxtan^2xdx

Answer»

SOLUTION :`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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