A019985 Decimal expansion of tangent of 87 degrees.

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

Offset

2,2

Comments

Also the decimal expansion of cotangent of 3 degrees. - Mohammad K. Azarian, Jun 29 2013

An algebraic integer of degree 8. - Charles R Greathouse IV, Aug 27 2017

Links

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

Example

19.0811366...

Mathematica

RealDigits[Tan[87 Degree], 10, 120][[1]] (* Harvey P. Dale, Sep 08 2015 *)

Prog

(PARI) tan(87*Pi/180) \\ Charles R Greathouse IV, Aug 27 2017

Crossrefs

Sequence in context: A202955 A394701 A019820 * A242711 A178229 A021995

Adjacent sequences: A019982 A019983 A019984 * A019986 A019987 A019988

Keyword

nonn,cons,changed

Author

N. J. A. Sloane

Status

approved