A197258 Decimal expansion of least x>0 having sin(2x) = sin(7x)^2.

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

Offset

0,2

Comments

The Mathematica program includes a graph. See A197133 for a guide to least x>0 satisfying sin(b*x)=(sin(c*x))^2 for selected b and c.

Links

Table of n, a(n) for n=0..86.

Example

x=0.0419614056775658508563003616587541236...

Mathematica

b = 2; c = 7; f[x_] := Sin[x]
t = x /. FindRoot[f[b*x] == f[c*x]^2, {x, .03, .05}, WorkingPrecision -> 100]
RealDigits[t] (* A197258 *)
Plot[{f[b*x], f[c*x]^2}, {x, 0, .06}]

Crossrefs

Cf. A197133.

Sequence in context: A346404 A332385 A347968 * A211783 A185780 A051672

Adjacent sequences: A197255 A197256 A197257 * A197259 A197260 A197261

Keyword

nonn,cons

Author

Clark Kimberling, Oct 12 2011

Extensions

a(81) onward corrected by Sean A. Irvine, Sep 08 2021

Status

approved