A019833 Decimal expansion of sine of 24 degrees.

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

Offset

0,1

Comments

An algebraic number of degree 8 and denominator 2. - Charles R Greathouse IV, Aug 27 2017

Links

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

Wikipedia, Exact trigonometric constants

Index entries for algebraic numbers, degree 8

Formula

Equals sin(2*Pi/15) = sqrt(1-A019875^2) = 2*A019821*A019887. - R. J. Mathar, Jun 18 2006

One of the 8 real-valued roots of 256*x^8-448*x^6+224*x^4-32*x^2+1=0. - R. J. Mathar, Aug 31 2025

Example

0.40673664307580020775398599034149761292313965106617...

Mathematica

First[RealDigits[Sin[24 Degree], 10, 100]] (* Paolo Xausa, Nov 14 2025 *)

Prog

(PARI) sin(2*Pi/15) \\ Charles R Greathouse IV, Aug 27 2017

Crossrefs

Sequence in context: A102393 A228131 A370743 * A362219 A333479 A361211

Adjacent sequences: A019830 A019831 A019832 * A019834 A019835 A019836

Keyword

nonn,cons,easy

Author

N. J. A. Sloane

Status

approved