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

0,1

Comments

An algebraic number of degree 24 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 24

Formula

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

Minimal polynomial 16777216*x^24 -100663296*x^22 +264241152*x^20 -398196736*x^18 +379846656*x^16 -238436352*x^14 +99147776*x^12 -26797056*x^10 +4485888*x^8 -423872*x^6 +18912*x^4 -288*x^2 +1. - R. J. Mathar, Jun 03 2026

Example

0.469471562...

Mathematica

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

Prog

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

Crossrefs

Sequence in context: A076418 A059910 A385256 * A132160 A021217 A103550

Adjacent sequences: A019834 A019835 A019836 * A019838 A019839 A019840

Keyword

nonn,cons,changed

Author

N. J. A. Sloane

Status

approved