A199736 Decimal expansion of greatest x satisfying x^2-4*x*cos(x)=2*sin(x).

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

Offset

1,2

Comments

See A199597 for a guide to related sequences. The Mathematica program includes a graph.

Links

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

Example

least: -3.69221424543584046112101682937268753850...
greatest:  1.519514926470401221585705162098148990...

Mathematica

a = 1; b = -4; c = 2;
f[x_] := a*x^2 + b*x*Cos[x]; g[x_] := c*Sin[x]
Plot[{f[x], g[x]}, {x, -4, 2}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, -3.7, -3.6}, WorkingPrecision -> 110]
RealDigits[r]   (* A199735 least root *)
r = x /. FindRoot[f[x] == g[x], {x, 1.5, 1.6}, WorkingPrecision -> 110]
RealDigits[r]   (* A199736 greatest root *)

Crossrefs

Cf. A199597.

Sequence in context: A193029 A094650 A189234 * A207873 A198671 A129343

Adjacent sequences: A199733 A199734 A199735 * A199737 A199738 A199739

Keyword

nonn,cons

Author

Clark Kimberling, Nov 09 2011

Status

approved