A019867 Decimal expansion of sine of 58 degrees.

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

Offset

0,1

Comments

An algebraic number of degree 12 and denominator 2. - Charles R Greathouse IV, Aug 27 2017

Links

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

Index entries for algebraic numbers, degree 12

Formula

Equals cos(8*Pi/45) = 2F1(23/30,7/30;1/2;3/4) / 2. - R. J. Mathar, Oct 27 2008

Equals 2*A019838*A019870. - R. J. Mathar, Jan 17 2021

Example

0.84804809...

Mathematica

RealDigits[Sin[58 Degree], 10, 120][[1]] (* Harvey P. Dale, Apr 24 2018 *)

Prog

(PARI) cos(8*Pi/45) \\ Charles R Greathouse IV, Aug 27 2017

Crossrefs

Sequence in context: A359837 A019684 A244210 * A144663 A197260 A155889

Adjacent sequences: A019864 A019865 A019866 * A019868 A019869 A019870

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved