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

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Comments

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

Examples

			0.84804809...
		

Links

• Ivan Panchenko, Table of n, a(n) for n = 0..1000
• Index entries for algebraic numbers, degree 12

Programs

Mathematica

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

PARI

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

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