This is now Trac#24211 <https://trac.sagemath.org/ticket/24211>, flagged as defect and major (I considered to mark it as critical, but tought that I had no persuasive reasons to do so ; feel free to overrule if necessary).
HTH, -- Emmanuel Charpentier Le lundi 13 novembre 2017 08:27:53 UTC+1, Emmanuel Charpentier a écrit : > > On 8.1.rc0. Consider : > > sage: import sympy > sage: [arcsin(t) for t in [0, 1/2, sqrt(2)/2, sqrt(3)/2, 1]] > [0, 1/6*pi, arcsin(1/2*sqrt(2)), arcsin(1/2*sqrt(3)), 1/2*pi] > sage: [maxima.asin(t).sage() for t in [0, 1/2, sqrt(2)/2, sqrt(3)/2, 1]] > [0, 1/6*pi, 1/4*pi, 1/3*pi, 1/2*pi] > sage: [sympy.asin(t)._sage_() for t in [0, 1/2, sqrt(2)/2, sqrt(3)/2, 1]] > [0, 1/6*pi, 1/4*pi, 1/3*pi, 1/2*pi] > sage: [arctan(t) for t in [0, 1/sqrt(3), 1, sqrt(3)]] > [0, arctan(1/3*sqrt(3)), 1/4*pi, arctan(sqrt(3))] > sage: [maxima.atan(t).sage() for t in [0, 1/sqrt(3), 1, sqrt(3)]] > [0, 1/6*pi, 1/4*pi, 1/3*pi] > sage: [sympy.atan(t)._sage_() for t in [0, 1/sqrt(3), 1, sqrt(3)]] > [0, 1/6*pi, 1/4*pi, 1/3*pi] > > This is not a bug *stricto sensu* (the answers are not false), but is > certainly a lack of functionality. > > Ticket-worthy ? (I think so...) > > HTH, > > -- > Emmanuel Charpentier > -- 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.
