an interesting integral

[@MASHabibi-d2d]

Thanks for your video master.

[@holyshit922]

Integration by parts
Integrate 1/(x^2sqrt(1-x^2)) first
1/(x^2sqrt(1-x^2)) = (1-x^2)/(x^2sqrt(1-x^2)) + x^2/(x^2sqrt(1-x^2))
1/(x^2sqrt(1-x^2)) = sqrt(1-x^2)/x^2 + 1/sqrt(1-x^2)
so this integral can be calculated with integration by parts only

[@ahmedsabri-ng2xx]

an interesting integral