Is, of course, impossible, with the usual example being that 60 degrees cannot be trisected, since 20 degrees is not constructible, since the the cosine of 20 degrees is not constructible, since adjoining the cosine of 20 degrees to the rationals creates a field extension whose degree is not a power of 2.
A modern approach: sage: isinstance(log(QQ[cos(pi/9)].degree(),2), Integer) False Rob -- You received this message because you are subscribed to the Google Groups "sage-edu" group. To post to this group, send email to sage-...@googlegroups.com. To unsubscribe from this group, send email to sage-edu+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-edu?hl=en.
