Updates: Status: Invalid Comment #1 on issue 1574 by asmeurer: missing trig identity http://code.google.com/p/sympy/issues/detail?id=1574
You need to use trigsimp(): >>> trigsimp(sin(x)**2 + cos(x)**2) 1 Perhaps simplify() should be calling trigsimp, along with all of the other functions it calls. -- 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 sympy-issues+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en -~----------~----~----~----~------~----~------~--~---