On 06/11/2013 09:44 PM, robin hankin wrote: > OK thanks for this, bug reported [at least, I think it is. I > couldn't see it on trac]. > > Now what about this: > > > sage: solve(sin(x) + cos(x) == cos(2*x),x,to_poly_solve=True) > [x == 2*pi*z264, x == 2*pi*z268 + 1/6004799503160661*I - 355/452, x == > 2*pi*z266 + 1/1125899906842624*I - 355/226, x == 2*pi*z270 + > 1/9007199254740992*I + 1065/452] > > > After the first, the solutions are not actually solutions of the > equation. Is this reportable or have I misunderstood what solve() is > supposed to do?
Just in case people hadn't spotted it, it also missed some solutions: -pi/4, 3*pi/4 and -pi/2, plus 2*pi*integer. And I think that is all of them (even including complex solutions). -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
