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!)
A199728 Decimal expansion of x>0 satisfying x^2-3*x*cos(x)=3*sin(x). 2
1, 6, 3, 5, 6, 8, 8, 7, 5, 1, 1, 5, 4, 1, 1, 0, 1, 7, 9, 7, 7, 8, 6, 1, 4, 4, 1, 8, 0, 3, 7, 7, 9, 0, 9, 4, 8, 4, 0, 9, 9, 5, 7, 9, 5, 1, 2, 3, 6, 0, 7, 1, 2, 7, 8, 3, 2, 8, 3, 6, 7, 8, 3, 3, 6, 7, 9, 0, 7, 1, 7, 4, 8, 1, 6, 2, 8, 8, 7, 4, 5, 8, 1, 5, 6, 0, 2, 3, 7, 3, 3, 8, 9, 0, 7, 7, 6, 1, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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

LINKS

Table of n, a(n) for n=1..99.

EXAMPLE

x=1.635688751154110179778614418037790948409...

MATHEMATICA

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

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

Plot[{f[x], g[x]}, {x, -2 Pi, Pi}, {AxesOrigin -> {0, 0}}]

r = x /. FindRoot[f[x] == g[x], {x, 1.63, 1.64}, WorkingPrecision -> 110]

RealDigits[r]    (* A199728 *)

CROSSREFS

Cf. A199597.

Sequence in context: A195482 A298529 A245273 * A199867 A171030 A294386

Adjacent sequences:  A199725 A199726 A199727 * A199729 A199730 A199731

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Nov 09 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 28 16:37 EDT 2022. Contains 354119 sequences. (Running on oeis4.)