A019983 Decimal expansion of tangent of 85 degrees.

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

Offset

2,3

Comments

Also the decimal expansion of cotangent of 5 degrees. - Ivan Panchenko, Sep 01 2014

Links

Ivan Panchenko, Table of n, a(n) for n = 2..1000

Index entries for algebraic numbers, degree 6.

Formula

From Amiram Eldar, May 19 2026: (Start)

Equals 1/A019903.

Minimal polynomial: x^6 - 12*x^5 + 3*x^4 + 40*x^3 + 3*x^2 - 12*x + 1. (End)

Example

11.430052302761343067210855549162890301370210797747608...

Mathematica

RealDigits[Tan[85 Degree], 10, 120][[1]] (* Harvey P. Dale, Feb 22 2023 *)

Prog

(PARI) tan(17*Pi/36) \\ Charles R Greathouse IV, Apr 29 2026

Crossrefs

Cf. A019903.

Sequence in context: A058878 A236289 A257536 * A019984 A187765 A274818

Adjacent sequences: A019980 A019981 A019982 * A019984 A019985 A019986

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved