A200125 Decimal expansion of greatest x satisfying 2*x^2 - 3*cos(x) = 3*sin(x).

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

Offset

1,2

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 = 1..10000

Example

least x: -0.6094168332632752999307535993160...
greatest x: 1.34204053424075776611980105081...

Mathematica

a = 2; 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, -.61, -.60}, WorkingPrecision -> 110]
RealDigits[r]  (* A200124 *)
r = x /. FindRoot[f[x] == g[x], {x, 1.34, 1.35}, WorkingPrecision -> 110]
RealDigits[r]  (* A200125 *)

Prog

(PARI) a=2; b=-3; c=3; solve(x=1, 2, a*x^2 + b*cos(x) - c*sin(x)) \\ G. C. Greubel, Jul 01 2018

Crossrefs

Cf. A199949.

Sequence in context: A077451 A352770 A019829 * A091528 A236679 A364871

Adjacent sequences: A200122 A200123 A200124 * A200126 A200127 A200128

Keyword

nonn,cons

Author

Clark Kimberling, Nov 14 2011

Status

approved