On Sun, Apr 12, 1998, Tom <tram@HUMBOLDT.TAKEOUT.COM> wrote: > > > Someone please integrate this by hand: sin(3x^2) > > I get -cos(x^3) in both cases. Do you have a problem with that? i doubt that is right since the derivative of -cos(x^3) is 3x^2sin(x^3), which isn't what he asked to integrate. close but that integral is a lot harder to do by hand than i first expected :) ..jeff