A197412 Decimal expansion of least x > 0 having sin(Pi*x/4) = sin(x/4)^2.

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

Offset

1,1

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=1..99.

Example

x=3.281372295311049899424798354839619220...

Mathematica

b = Pi/4; c = 1/4; f[x_] := Sin[x]
t = x /. FindRoot[f[b*x] == f[c*x]^2, {x, 3.2, 3.5}, WorkingPrecision -> 200]
RealDigits[t] (* A197412 *)
Plot[{f[b*x], f[c*x]^2}, {x, 0, 2*Pi}]

Crossrefs

Cf. A197133.

Sequence in context: A143312 A224234 A305368 * A275373 A113794 A086774

Adjacent sequences: A197409 A197410 A197411 * A197413 A197414 A197415

Keyword

nonn,cons

Author

Clark Kimberling, Oct 14 2011

Status

approved