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A199963 Decimal expansion of least x satisfying x^2 + 4*cos(x) = 3*sin(x). 3
1, 2, 3, 9, 7, 5, 1, 1, 5, 4, 8, 3, 0, 7, 0, 3, 3, 2, 2, 6, 6, 3, 0, 9, 4, 2, 9, 8, 7, 0, 9, 1, 8, 2, 0, 7, 2, 6, 0, 6, 9, 1, 2, 5, 7, 4, 9, 4, 5, 2, 1, 7, 2, 4, 7, 2, 3, 1, 7, 5, 6, 5, 2, 6, 4, 7, 6, 7, 4, 5, 9, 6, 3, 6, 0, 1, 8, 5, 6, 2, 6, 2, 6, 5, 9, 7, 5, 8, 2, 5, 7, 9, 2, 3, 1, 8, 7, 4, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A199949 for a guide to related sequences. The Mathematica program includes a graph.

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000

EXAMPLE

least x:  1.2397511548307033226630942987091820...

greatest x: 2.178843303038438478747351546631120...

MATHEMATICA

a = 1; b = 4; c = 3;

f[x_] := a*x^2 + b*Cos[x]; g[x_] := c*Sin[x]

Plot[{f[x], g[x]}, {x, -1, 3}, {AxesOrigin -> {0, 0}}]

r = x /. FindRoot[f[x] == g[x], {x, 1.23, 1.24}, WorkingPrecision -> 110]

RealDigits[r]  (* A199963 *)

r = x /. FindRoot[f[x] == g[x], {x, 2.17, 2.18}, WorkingPrecision -> 110]

RealDigits[r]  (* A199964 *)

PROG

(PARI) a=1; b=4; c=3; solve(x=1, 2, a*x^2 + b*cos(x) - c*sin(x)) \\ G. C. Greubel, Jun 23 2018

CROSSREFS

Cf. A199949.

Sequence in context: A108694 A267896 A199858 * A016634 A244257 A171054

Adjacent sequences:  A199960 A199961 A199962 * A199964 A199965 A199966

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Nov 12 2011

STATUS

approved

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Last modified August 6 12:33 EDT 2020. Contains 336246 sequences. (Running on oeis4.)