A019937 Decimal expansion of tangent of 39 degrees.

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

Offset

0,1

Comments

Also the decimal expansion of cotangent of 51 degrees. - Ivan Panchenko, Aug 01 2014

Links

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

Wikipedia, Exact trigonometric constants

Index entries for algebraic numbers, degree 8.

Formula

Minimal polynomial x^8 -16*x^7 -60*x^6 +16*x^5 +134*x^4 +16*x^3 -60*x^2 -16*x +1. - R. J. Mathar, Jun 03 2026

Mathematica

RealDigits[Tan[39 Degree], 10, 120][[1]] (* Harvey P. Dale, Nov 24 2016 *)

Prog

(PARI) tan(13*Pi/60) \\ Charles R Greathouse IV, Apr 30 2026

Crossrefs

Sequence in context: A166529 A245293 A200018 * A382602 A176460 A320378

Adjacent sequences: A019934 A019935 A019936 * A019938 A019939 A019940

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved