I have 2 equations in x & y, each of form trig(x) + P(x,y) = 0 where trig is sin or cos, and P is a real polynomial of degree 3 or 4. I just found out that I have no idea how to ask Mathematica to solve this numerically. (I tried Roots, Solve, NSolve, N[Solve[...],10], and few other things, but it always came back with a No Can Do message.) On the other hand, with the Mac "Grapher" utility, I can plot each locus and see where they intersect. Biggest problem with Grapher is, when I enter 100% logically equivalent forms of the same equation (like just putting one term on the other side of the equation!) (and yes, changing its sign), it sometimes plots entirely different curves, which have entirely different intersections. Can someone please advise me how to get either of these programs to succeed? (By the way, I'm almost sure my equations have infinitely many simultaneous solutions, but I'm only interested in the unique one that's in the first quadrant nearest the origin.) Thanks in advance. --Dan _____________________________________________________________________ "It don't mean a thing if it ain't got that certain je ne sais quoi." --Peter Schickele