Least Squares Fit By f(x) = Acos(Bx+C) (Algorithm 376 $E2)) CACM February, 1970 Spath, H. nonlinear least squares fit 5.15 CA700214 JB February 14, 1978 9:47 AM 2101 4 2101 2102 4 2101 1639 5 2101 2101 5 2101 2101 5 2101 2101 5 2101