login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A197494 Decimal expansion of least x>0 having cos(x)=(cos(Pi*x/3))^2. 2
1, 5, 6, 6, 0, 2, 3, 6, 1, 3, 6, 2, 2, 2, 8, 9, 7, 0, 2, 3, 0, 3, 8, 2, 0, 8, 2, 3, 9, 4, 8, 9, 4, 6, 1, 1, 0, 5, 0, 0, 2, 3, 7, 1, 8, 4, 2, 4, 8, 4, 9, 7, 1, 8, 2, 1, 8, 6, 5, 9, 9, 3, 4, 1, 5, 9, 8, 6, 8, 2, 4, 0, 3, 9, 2, 3, 5, 2, 3, 3, 2, 6, 4, 2, 1, 9, 4, 2, 2, 7, 2, 3, 3, 1, 9, 9, 4, 8, 2 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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=1..99.

EXAMPLE

x=1.566023613622289702303820823948946110500...

MATHEMATICA

b = 1; c = Pi/3; f[x_] := Cos[x]

t = x /. FindRoot[f[b*x] == f[c*x]^2, {x, 1.5, 1.6}, WorkingPrecision -> 110]

RealDigits[t] (* A197494 *)

Plot[{f[b*x], f[c*x]^2}, {x, 0, 2}]

CROSSREFS

Cf. A197476.

Sequence in context: A217177 A157339 A029944 * A153415 A154010 A258750

Adjacent sequences:  A197491 A197492 A197493 * A197495 A197496 A197497

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Oct 15 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 25 05:19 EDT 2019. Contains 326318 sequences. (Running on oeis4.)