OFFSET
0,1
COMMENTS
The Mathematica program includes a graph. See A197476 for a guide for the least x > 0 satisfying cos(b*x) = cos(c*x)^2 for selected b and c.
EXAMPLE
x=0.50629789923405982675001156278369703252865816395828...
MATHEMATICA
b = 2; c = 3 Pi/2; f[x_] := Cos[x]
t = x /. FindRoot[f[b*x] == f[c*x]^2, {x, .5, .51}, WorkingPrecision -> 110]
RealDigits[t] (* A197508 *)
Plot[{f[b*x], f[c*x]^2}, {x, 0, Pi/6}]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Oct 15 2011
EXTENSIONS
a(87) onward corrected by Sean A. Irvine, Sep 08 2021
STATUS
approved