A200634 Decimal expansion of the greater of two values of x satisfying 6*x^2 - 1 = tan(x) and 0 < x < Pi/2.

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

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.

Index entries for transcendental numbers.

Example

lesser:  0.50974170891854848924604966585258686270831...
greater: 1.48978365608349822096681798686067147504261...

Mathematica

a = 6; c = 1;
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, .5, .6}, WorkingPrecision -> 110]
RealDigits[r]   (* A200633 *)
r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]
RealDigits[r]   (* A200634 *)

Crossrefs

Cf. A200614.

Sequence in context: A366022 A316251 A108616 * A154177 A010480 A087021

Adjacent sequences: A200631 A200632 A200633 * A200635 A200636 A200637

Keyword

nonn,cons,changed

Author

Clark Kimberling, Nov 20 2011

Status

approved