A019848 Decimal expansion of sine of 39 degrees.

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

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Comments

This sequence is also decimal expansion of cosine of 51 degrees. - Mohammad K. Azarian, Jun 29 2013

An algebraic number of degree 16 and denominator 2. - Charles R Greathouse IV, Nov 05 2017

Links

• Ivan Panchenko, Table of n, a(n) for n = 0..1000
• Wikipedia, Trigonometric constants expressed in real radicals
• Index entries for algebraic numbers, degree 16

Crossrefs

Cf. A019812, A019822, A019835, A019845, A019886, A019873, A019896, A019863.

Programs

Mathematica

RealDigits[Sin[39 Degree],10,120][[1]] (* Harvey P. Dale, Oct 02 2015 *)

PARI

sin(13/60*Pi) \\ Charles R Greathouse IV, Nov 05 2017

Formula

Equals A019835*A019886 + A019822*A019873 = A019845*A019896 + A019812*A019863. - R. J. Mathar, Jan 27 2021