A200240 Decimal expansion of greatest x satisfying 3*x^2-3*cos(x)=2*sin(x).

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

Offset

1,3

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

Index entries for transcendental numbers.

Example

least x: -0.63766115794607313411989545658819620...
greatest x: 1.039829693324607596071793532120387...

Mathematica

a = 3; b = -3; c = 2;
f[x_] := a*x^2 + b*Cos[x]; g[x_] := c*Sin[x]
Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, -.64, -.63}, WorkingPrecision -> 110]
RealDigits[r]   (* A200239 *)
r = x /. FindRoot[f[x] == g[x], {x, 1.0, 1.1}, WorkingPrecision -> 110]
RealDigits[r]   (* A200240 *)

Prog

(PARI) a=3; b=-3; c=2; solve(x=1.0, 1.1, a*x^2 + b*cos(x) - c*sin(x)) \\ G. C. Greubel, Jun 22 2018

Crossrefs

Cf. A199949.

Sequence in context: A001226 A338402 A093498 * A378021 A199052 A021255

Adjacent sequences: A200237 A200238 A200239 * A200241 A200242 A200243

Keyword

nonn,cons

Author

Clark Kimberling, Nov 15 2011

Status

approved