[math-fun] black belt trig

Recent solid angles analysis entailed some messy intermediate trig, but the most strenuous solution I've seen is for the phase parameter in the validity constraint for a bilateral generalization of Dougall's 7F6 identity, which I've tacked on to www.tweedledum.com/rwg/idents.htm The e^(i x) (EXPONENTIALIZE) sledgehammer gives you hideous radicals, which makes it a bit surprising the answer is as "nice" as it is. --rwg --------------------------------- Get the Yahoo! toolbar and be alerted to new email wherever you're surfing.