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A199621 Decimal expansion of x<0 satisfying 2*x+cos(x)=0. 2
4, 5, 0, 1, 8, 3, 6, 1, 1, 2, 9, 4, 8, 7, 3, 5, 7, 3, 0, 3, 6, 5, 3, 8, 6, 9, 6, 7, 6, 2, 6, 8, 1, 8, 2, 7, 3, 2, 0, 1, 3, 6, 5, 0, 1, 7, 2, 3, 0, 5, 5, 4, 3, 4, 0, 1, 5, 0, 5, 8, 4, 9, 1, 3, 6, 3, 6, 4, 1, 5, 6, 6, 9, 8, 5, 2, 2, 3, 3, 7, 9, 5, 4, 7, 4, 1, 4, 1, 3, 3, 0, 6, 9, 9, 2, 3, 1, 6, 2 (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=-0.450183611294873573036538696762681827320...

MATHEMATICA

a = 2; b = 1; c = 0;

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

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

r = x /. FindRoot[f[x] == g[x], {x, -.46, -.45}, WorkingPrecision -> 110]

RealDigits[r]  (* A199621 *)

CROSSREFS

Cf. A199597.

Sequence in context: A262400 A075424 A200619 * A199390 A270914 A048837

Adjacent sequences:  A199618 A199619 A199620 * A199622 A199623 A199624

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Nov 08 2011

STATUS

approved

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Last modified April 25 12:19 EDT 2019. Contains 322456 sequences. (Running on oeis4.)