A200646 Decimal expansion of least x>0 satisfying 10*x^2=tan(x).

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

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..99.

Example

x=1.527991497913999917171134384861455938677...

Mathematica

a = 10; 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, 1.52, 1.53}, WorkingPrecision -> 110]
RealDigits[r] (* A200646 *)

Crossrefs

Cf. A200338.

Sequence in context: A267211 A201423 A155790 * A198130 A309773 A241388

Adjacent sequences: A200643 A200644 A200645 * A200647 A200648 A200649

Keyword

nonn,cons

Author

Clark Kimberling, Nov 20 2011

Status

approved