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

Author

N. J. A. Sloane

Keywords

• nonn
• cons
• changed

Comments

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

Examples

			tan(2*Pi/15) = 0.44522868...
		

Links

• Ivan Panchenko, Table of n, a(n) for n = 0..1000
• Wikipedia, Exact trigonometric constants
• Index entries for algebraic numbers, degree 8

Programs

Mathematica

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

Formula

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