A200095 Decimal expansion of least x satisfying x^2 - 3*cos(x) = 3*sin(x), negated.

6, 7, 7, 1, 1, 9, 4, 1, 1, 6, 9, 7, 9, 4, 3, 1, 3, 0, 1, 8, 4, 1, 7, 9, 5, 2, 0, 0, 9, 8, 9, 1, 7, 0, 2, 1, 5, 5, 6, 6, 4, 5, 5, 5, 2, 5, 3, 3, 6, 9, 3, 2, 4, 4, 3, 7, 6, 9, 1, 1, 5, 4, 0, 1, 8, 3, 5, 0, 3, 8, 3, 8, 7, 6, 2, 7, 8, 4, 0, 3, 8, 9, 9, 8, 9, 8, 2, 7, 3, 9, 2, 3, 4, 8, 4, 8, 2, 9, 5

Offset

0,1

Comments

See A199949 for a guide to related sequences. The Mathematica program includes a graph.

Links

G. C. Greubel, Table of n, a(n) for n = 0..10000

Example

least x:  -0.677119411697943130184179520098917021...
greatest x: 1.6546997822939010711316866818308006354...

Mathematica

a = 1; b = -3; c = 3;
f[x_] := a*x^2 + b*Cos[x]; g[x_] := c*Sin[x]
Plot[{f[x], g[x]}, {x, -3, 3}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, -.88, -.67}, WorkingPrecision -> 110]
RealDigits[r]  (* A200095 *)
r = x /. FindRoot[f[x] == g[x], {x, 1.65, 1.66}, WorkingPrecision -> 110]
RealDigits[r]  (* A200096 *)

Prog

(PARI) a=1; b=-3; c=3; solve(x=-1, 0, a*x^2 + b*cos(x) - c*sin(x)) \\ G. C. Greubel, Jun 24 2018

Crossrefs

Cf. A199949.

Sequence in context: A339135 A249539 A139726 * A359106 A201753 A084256

Adjacent sequences: A200092 A200093 A200094 * A200096 A200097 A200098

Keyword

nonn,cons

Author

Clark Kimberling, Nov 13 2011

Status

approved