Issue 1201: "better" tan(x**2).diff(x) http://code.google.com/p/sympy/issues/detail?id=1201
Comment #2 by mattpap: This change does break the integrator because Risch algorithm requires certain derivatives in a special form (derivative of tan(x) is a nice example). The solution is to add context dependent derivatives (in the simplest way just put appropriate derivative of tan(x) somewhere in integrals/risch.py module). Anyway I'm not convinced why this change is needed at all. One can argue that cos(x)**(-2) or sec(x)**2 is simpler than 1 + tan(x)**2, however the other formula does not involve "new" functions. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-issues@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en -~----------~----~----~----~------~----~------~--~---
