A200223 Decimal expansion of least x satisfying 3*x^2 - cos(x) = 2*sin(x), negated.

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

Offset: 0

Author

Clark Kimberling, Nov 14 2011

Keywords

• nonn
• cons

Comments

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

Examples

			least x: -0.3231143338862262845356370492311714...
greatest x: 0.84890518832952236173456381626613...
		

Links

• G. C. Greubel, Table of n, a(n) for n = 0..10000
• Index entries for transcendental numbers.

Crossrefs

Cf. A199949.

Programs

Mathematica

a = 3; b = -1; c = 2;
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, -.33, -.32}, WorkingPrecision -> 110]
RealDigits[r]   (* A200223 *)
r = x /. FindRoot[f[x] == g[x], {x, .84, .85}, WorkingPrecision -> 110]
RealDigits[r]   (* A200224 *)

PARI

a=3; b=-1; c=2; solve(x=-1, 0, a*x^2 + b*cos(x) - c*sin(x)) \\ G. C. Greubel, Jun 30 2018