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A201566 Decimal expansion of least x satisfying x^2 + 3 = csc(x) and 0 < x < Pi. 2
3, 2, 7, 6, 4, 8, 2, 4, 7, 1, 1, 3, 6, 6, 8, 6, 7, 8, 0, 9, 8, 2, 4, 7, 7, 0, 6, 2, 0, 9, 8, 1, 9, 5, 2, 9, 8, 4, 4, 3, 7, 8, 4, 5, 2, 8, 2, 0, 0, 2, 4, 4, 8, 6, 4, 8, 9, 9, 2, 1, 7, 0, 7, 4, 8, 2, 1, 6, 1, 7, 1, 2, 6, 7, 5, 1, 4, 2, 8, 3, 5, 6, 9, 6, 9, 5, 8, 9, 9, 8, 1, 6, 1, 6, 1, 7, 2, 1, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

See A201564 for a guide to related sequences.  The Mathematica program includes a graph.

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..10000

EXAMPLE

least:  0.3276482471136686780982477062098195298...

greatest:  3.0606476216743906494670210614415753...

MATHEMATICA

a = 1; c = 3;

f[x_] := a*x^2 + c; g[x_] := Csc[x]

Plot[{f[x], g[x]}, {x, 0, Pi}, {AxesOrigin -> {0, 0}}]

r = x /. FindRoot[f[x] == g[x], {x, .3, .4}, WorkingPrecision -> 110]

RealDigits[r]   (* A201567 *)

r = x /. FindRoot[f[x] == g[x], {x, 3.0, 3.1}, WorkingPrecision -> 110]

RealDigits[r]   (* A201568 *)

PROG

(PARI) a=1; c=3; solve(x=0.2, 0.5, a*x^2 + c - 1/sin(x)) \\ G. C. Greubel, Aug 21 2018

CROSSREFS

Cf. A201564.

Sequence in context: A269402 A268934 A268832 * A072764 A130328 A228993

Adjacent sequences:  A201563 A201564 A201565 * A201567 A201568 A201569

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Dec 03 2011

STATUS

approved

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Last modified June 4 17:14 EDT 2020. Contains 334828 sequences. (Running on oeis4.)