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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A199471 Decimal expansion of x>0 satisfying 2*x^2-x*sin(x)=cos(x). 2
7, 9, 6, 4, 3, 0, 4, 1, 6, 7, 9, 6, 3, 4, 3, 0, 7, 9, 6, 9, 6, 3, 5, 9, 0, 0, 2, 2, 9, 6, 5, 8, 8, 1, 1, 8, 0, 2, 1, 2, 7, 0, 7, 5, 2, 2, 7, 0, 7, 1, 0, 8, 5, 5, 1, 7, 3, 5, 2, 0, 8, 9, 5, 9, 9, 2, 9, 7, 7, 8, 0, 5, 4, 9, 8, 6, 0, 9, 3, 1, 0, 3, 9, 6, 6, 9, 6, 1, 4, 5, 4, 8, 1, 7, 2, 9, 7, 8, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

See A199429 for a guide to related sequences.  The Mathematica program includes a graph.

LINKS

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

EXAMPLE

x=0.796430416796343079696359002296588118021270...

MATHEMATICA

a = 2; b = -1; c = 1;

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

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

r = x /. FindRoot[f[x] == g[x], {x, .79, .80}, WorkingPrecision -> 110]

RealDigits[r]  (* A199471 *)

CROSSREFS

Cf. A199429.

Sequence in context: A198921 A099877 A197327 * A200098 A239069 A154168

Adjacent sequences:  A199468 A199469 A199470 * A199472 A199473 A199474

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Nov 07 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 October 23 11:48 EDT 2019. Contains 328345 sequences. (Running on oeis4.)