From: Bard Ermentrout <ermentrout@gm...>  20131116 00:17:19

Is there any way to differentiate under the integral sign. I'd like to define a function: int(exp(a*cos(x)),x,0,pi); and then get a Taylor series approximation of it in terms of a. Reduce does not understand how to differentiate under the integra sign to get a bunch of simple integrals of powers of cos(x) Regards  Bard Ermentrout 