login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A199664 Decimal expansion of x > 0 satisfying 3*x^2 + x*cos(x) = 3*sin(x). 2
6, 6, 5, 5, 9, 9, 0, 7, 7, 3, 3, 0, 6, 7, 6, 1, 5, 2, 5, 0, 5, 2, 6, 5, 1, 9, 2, 2, 6, 8, 8, 5, 3, 0, 2, 8, 5, 4, 3, 4, 8, 9, 7, 4, 7, 9, 1, 5, 0, 6, 1, 4, 7, 2, 4, 8, 9, 4, 2, 4, 2, 2, 3, 7, 9, 0, 9, 6, 8, 0, 5, 6, 1, 6, 1, 3, 3, 8, 6, 2, 2, 1, 1, 6, 4, 8, 5, 2, 4, 6, 3, 4, 8, 5, 9, 8, 9, 6, 7 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

See A199597 for a guide to related sequences.  The Mathematica program includes a graph.

LINKS

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

EXAMPLE

x=0.6655990773306761525052651922688530...

MATHEMATICA

a = 3; b = 1; c = 3;

f[x_] := a*x^2 + b*x*Cos[x]; g[x_] := c*Sin[x]

Plot[{f[x], g[x]}, {x, -1, 1.5}, {AxesOrigin -> {0, 0}}]

r = x /. FindRoot[f[x] == g[x], {x, .66, .67}, WorkingPrecision -> 110]

RealDigits[r]   (* A199664 *)

CROSSREFS

Cf. A199597.

Sequence in context: A101801 A350362 A351120 * A019180 A019103 A272619

Adjacent sequences:  A199661 A199662 A199663 * A199665 A199666 A199667

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Nov 09 2011

EXTENSIONS

a(88) onwards corrected by Georg Fischer, Aug 03 2021

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 22 19:57 EDT 2022. Contains 353957 sequences. (Running on oeis4.)