Hello, you might have missed the minus sign and the "it should be positive" in my post.
Best regards, Mickaël On Saturday, September 16, 2017 at 1:33:47 PM UTC+2, David Joyner wrote: > > On Sat, Sep 16, 2017 at 7:27 AM, Mickael Pechaud > <mickael...@gmail.com <javascript:>> wrote: > > Hello, > > > > I'm running SageMath 7.2, on a 64bits laptop with a Ubuntu 16.04.2 LTS > > (xenial). I got a wrong answer from cos : > > > > sage: float(cos(14*pi/9)) > > -0.17364817766693041 > > > > FYI, cocalc.com returns > > 0.17364817766693041 > > > It should be positive - and it's inconsistent with the following lines : > > > > sage: float(cos(14*pi/9-2*pi)) > > 0.17364817766693041 > > > > > > sage: float(14*pi/9) > > 4.886921905584122 > > > > sage: float(cos(4.886921905584122)) > > 0.17364817766692953 > > > > Am I missing something, or is there an actual problem here ? > > > > Thanks in advance, > > > > Mickaël > > > > -- > > You received this message because you are subscribed to the Google > Groups > > "sage-devel" group. > > To unsubscribe from this group and stop receiving emails from it, send > an > > email to sage-devel+...@googlegroups.com <javascript:>. > > To post to this group, send email to sage-...@googlegroups.com > <javascript:>. > > Visit this group at https://groups.google.com/group/sage-devel. > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
