A197573 Decimal expansion of least x > 0 having cos(x) = cos(3*Pi*x/2)^2.

5, 0, 3, 6, 8, 1, 8, 0, 7, 6, 2, 5, 6, 5, 8, 3, 1, 1, 1, 5, 0, 3, 2, 4, 8, 1, 5, 7, 1, 0, 4, 9, 1, 4, 5, 5, 6, 6, 5, 7, 0, 7, 0, 6, 0, 9, 9, 5, 1, 3, 3, 9, 8, 4, 0, 9, 7, 3, 8, 1, 7, 2, 1, 2, 8, 3, 1, 5, 0, 1, 9, 9, 3, 5, 3, 0, 1, 9, 4, 5, 9, 7, 2, 9, 5, 0, 2, 5, 8, 6, 3, 0, 2, 3, 5, 0, 5, 7, 2

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.

Links

Table of n, a(n) for n=0..98.

Example

x=0.5036818076256583111503248157104914556657070609...

Mathematica

b = 1; c = 3*Pi/2; f[x_] := Sin[x]
t = x /. FindRoot[f[b*x] == f[c*x]^2, {x, .5, .51}, WorkingPrecision -> 200]
RealDigits[t] (* A197573 *)
Plot[{f[b*x], f[c*x]^2}, {x, 0, Pi/4}]

Crossrefs

Cf. A197133.

Sequence in context: A326054 A062526 A264785 * A019947 A193182 A139399

Adjacent sequences: A197570 A197571 A197572 * A197574 A197575 A197576

Keyword

nonn,cons

Author

Clark Kimberling, Oct 16 2011

Status

approved