A019922 Decimal expansion of tangent of 24 degrees.

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

Offset

0,1

Comments

Also the decimal expansion of cotangent of 66 degrees. - Mohammad K. Azarian, Jun 30 2013

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 tan(2*Pi/15).

Equals A019833 / A019875. - R. J. Mathar, Sep 06 2025

Minimal polynomial x^8 -92*x^6 +134*x^4 -28*x^2 +1. - R. J. Mathar, Jun 03 2026

Equals 1/A019964. - Amiram Eldar, Jun 12 2026

Example

0.44522868530853616392236703064566575498743067842792...

Mathematica

RealDigits[Tan[24 Degree], 10, 120][[1]] (* Harvey P. Dale, Feb 19 2024 *)

Crossrefs

Cf. A019833, A019875, A019964.

Sequence in context: A006581 A370717 A255902 * A092171 A179778 A307983

Adjacent sequences: A019919 A019920 A019921 * A019923 A019924 A019925

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved