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A019859 Decimal expansion of sine of 50 degrees. 2
7, 6, 6, 0, 4, 4, 4, 4, 3, 1, 1, 8, 9, 7, 8, 0, 3, 5, 2, 0, 2, 3, 9, 2, 6, 5, 0, 5, 5, 5, 4, 1, 6, 6, 7, 3, 9, 3, 5, 8, 3, 2, 4, 5, 7, 0, 8, 0, 3, 9, 5, 2, 4, 5, 8, 5, 4, 0, 4, 5, 2, 8, 4, 6, 4, 2, 1, 5, 5, 3, 8, 8, 8, 5, 6, 8, 7, 4, 7, 2, 3, 5, 2, 8, 2, 2, 9, 2, 7, 6, 6, 8, 0, 5, 4, 8, 4, 9, 3 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

A cubic integer with denominator 2. - Charles R Greathouse IV, Nov 05 2017

LINKS

Ivan Panchenko, Table of n, a(n) for n = 0..1000

FORMULA

Equals cos(2*Pi/9) = 2F1(5/6,1/6;1/2;3/4) / 2 . - R. J. Mathar, Oct 27 2008

MATHEMATICA

RealDigits[ Cos[ 2Pi/9], 10, 111][[1]] (* Robert G. Wilson v *)

RealDigits[Sin[50 Degree], 10, 120][[1]] (* Harvey P. Dale, Dec 19 2012 *)

PROG

(PARI) sin(5/18*Pi) \\ Charles R Greathouse IV, Nov 05 2017

CROSSREFS

Sequence in context: A092874 A198109 A059751 * A188736 A265304 A102769

Adjacent sequences:  A019856 A019857 A019858 * A019860 A019861 A019862

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 21 11:21 EST 2019. Contains 319354 sequences. (Running on oeis4.)