A019847 Decimal expansion of sine of 38 degrees.

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

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Comments

This sequence is also decimal expansion of cosine of 52 degrees. - Mohammad K. Azarian, Jun 29 2013

An algebraic number of degree 12 and denominator 2. - Charles R Greathouse IV, Nov 05 2017

Examples

			0.6156614...
		

Links

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

Programs

Mathematica

RealDigits[Sin[38 Degree],10,120][[1]] (* Harvey P. Dale, Dec 06 2020 *)

PARI

sin(19/90*Pi) \\ Charles R Greathouse IV, Nov 05 2017

Formula

Equals 2*A019828*A019880. - R. J. Mathar, Jan 17 2021