13 May
2011
13 May
'11
2:12 p.m.
="Dan Asimov" <dasimov@earthlink.net> f(u,v) = sqrt(5+4cos(u)) + 2.5*sin((u-v)/2) + sqrt(11-6cos(v)-2sin(v)).
Also, computer or not, it might helpful to get rid of the trig here by first substituting s:=sin u, t:=sin v (or something similar) leaving mere algebra.