On 04/15/2011 12:39 PM, kcrisman wrote: > > > On Apr 15, 8:03 am, Laurent <[email protected]> wrote: >> Le 15/04/2011 02:39, Michael Orlitzky a crit :> Am I going crazy? >> >>> sage: integrate(cos(2*x)*cos(x), x, 0, pi) >>> 4/3 >> >> Actually Sage seems not to get the correct primitive : >> >> ---------------------------------------------------------------------- >> | Sage Version 4.6.1, Release Date: 2011-01-11 | >> | Type notebook() for the GUI, and license() for information. | >> ---------------------------------------------------------------------- >> sage: f(x)=cos(2*x)*cos(x) >> sage: F=f.integrate(x) >> sage: F.diff(x).simplify_trig() >> x |--> 2*sin(x)*cos(x)^2 >> >> Anyway, computation by hand shows that a primitive of cos(2x)cos(x) is >> (-2/3)*sin(x)^3+sin(x) >> >> The correct answer is thus zero and sage is wrong. > > As pointed out above, the latest alphas have Maxima 5.23.2, so this is > not a problem any more. > > - kcrisman >
To avoid reporting old (fixed) issues in the future, where can we find the latest development release? -- 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
