A019837 Decimal expansion of sine of 28 degrees.

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

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Comments

An algebraic number of degree 24 and denominator 2. - Charles R Greathouse IV, Aug 27 2017

Examples

			0.469471562...
		

Links

• Ivan Panchenko, Table of n, a(n) for n = 0..1000
• Index entries for algebraic numbers, degree 24

Programs

Mathematica

RealDigits[Sin[28 Degree],10,120][[1]] (* Harvey P. Dale, Apr 19 2023 *)

PARI

sin(7*Pi/45) \\ Charles R Greathouse IV, Aug 27 2017

Formula

Equals 2*A019823*A019885. - R. J. Mathar, Jan 17 2021