A019874 Decimal expansion of sine of 65 degrees.

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

Offset

0,1

Comments

An algebraic number of degree 12 and denominator 2. - Charles R Greathouse IV, Nov 06 2017

Links

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

Index entries for algebraic numbers, degree 12

Formula

Equals cos(5*pi/36) = 2F1(17/24,7/24;1/2;3/4) / 2. - R. J. Mathar, Oct 27 2008

Equals A019861 * A019886 + A019822 * A019847 = A010527 * A019894 + A019814*(1/2). - R. J. Mathar, Jan 27 2021

Mathematica

RealDigits[Sin[65 Degree], 10, 120][[1]] (* Harvey P. Dale, Oct 29 2020 *)

Prog

(PARI) sin(13/36*Pi) \\ Charles R Greathouse IV, Nov 06 2017

Crossrefs

Sequence in context: A019740 A188738 A199789 * A197520 A068467 A131223

Adjacent sequences: A019871 A019872 A019873 * A019875 A019876 A019877

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved