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intsec^30xtanxdx

Answer»

SOLUTION :`intsec^30xtanxdx`
=`intsec^29x.secx.tanxdx`
[PUT secx=t
Then secx.tanxdx=dt]
=`intt^29dt`
=`1/30t^30+C=1/30sec^30x+C`


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