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

Author

N. J. A. Sloane

Keywords

• nonn
• cons
• changed

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

Programs

PARI

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

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