A199471 Decimal expansion of x>0 satisfying 2*x^2-x*sin(x)=cos(x).

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

Offset: 0

Author

Clark Kimberling, Nov 07 2011

Keywords

• nonn
• cons

Comments

See A199429 for a guide to related sequences. The Mathematica program includes a graph.

Examples

			0.796430416796343079696359002296588118021270...
		

Links

• Index entries for transcendental numbers.

Crossrefs

Cf. A199429.

Programs

Mathematica

a = 2; b = -1; c = 1;
f[x_] := a*x^2 + b*x*Sin[x]; g[x_] := c*Cos[x]
Plot[{f[x], g[x]}, {x, -Pi, Pi}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, .79, .80}, WorkingPrecision -> 110]
RealDigits[r]  (* A199471 *)