In 64bit 4.6.2 fedora13 Dell Vostro 1720 sage: numerical_integral(lambda x: cos(2*x)*cos(x), 0, pi) (4.4478052108155282e-17, 1.3516940761795953e-14) sage: plot(cos(2*x)*cos(x), (x, 0, pi))
Maxima and Wolfram alpha: 0 sage: integral(cos(2*x)*cos(x), x, 0, pi) 4/3 On 15 Kwi, 05:27, Dan Drake <[email protected]> wrote: > On Thu, 14 Apr 2011 at 07:40PM -0700, John H Palmieri wrote: > > On Thursday, April 14, 2011 5:39:27 PM UTC-7, Michael Orlitzky wrote: > > > > Am I going crazy? > > > > sage: integrate(cos(2*x)*cos(x), x, 0, pi) > > > 4/3 > > > I get zero when I compute it. What version of Sage is this? > > I'm getting 4/3 in 4.6.1 and 4.6.2. In 4.7.alpha4, it's correct. > > Dan > > -- > --- Dan Drake > ----- http://mathsci.kaist.ac.kr/~drake > ------- > > signature.asc > < 1KWyświetlPobierz -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
