A200618 Decimal expansion of least x>0 satisfying 5*x^2=tan(x).

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

Offset: 1

Author

Clark Kimberling, Nov 20 2011

Keywords

• nonn
• cons

Comments

See A200614 for a guide to related sequences. The Mathematica program includes a graph.

Examples

			1.47970520224435805967512399395233185295971...
		

Links

• Index entries for transcendental numbers.

Crossrefs

Cf. A200338.

Programs

Mathematica

a = 5; c = 0;
f[x_] := a*x^2 - c; g[x_] := Tan[x]
Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]
RealDigits[r]   (* A200618 *)