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A019987 Decimal expansion of tangent of 89 degrees. 11
5, 7, 2, 8, 9, 9, 6, 1, 6, 3, 0, 7, 5, 9, 4, 2, 4, 6, 8, 7, 2, 7, 8, 1, 4, 7, 5, 3, 7, 1, 1, 2, 5, 7, 7, 9, 8, 0, 2, 1, 7, 5, 2, 2, 2, 3, 5, 1, 4, 3, 9, 2, 6, 4, 7, 2, 5, 8, 1, 1, 0, 3, 6, 0, 6, 5, 2, 9, 2, 2, 8, 9, 3, 6, 4, 7, 9, 1, 9, 3, 0, 6, 7, 2, 4, 1, 6, 2, 8, 2, 2, 0, 6, 8, 3, 8, 8, 0, 6 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

Also cotangent of 1 degree. - Mohammad K. Azarian, Jan 21 2006

An angebraic integer of degree 24. - Charles R Greathouse IV, Aug 27 2017

REFERENCES

Mohammad K. Azarian, Forty-Five Nested Equilateral Triangles and cosecant of 1 degree, Problem 813, College Mathematics Journal, Vol. 36, No. 5, November 2005, p. 413-414.  Solution published in Vol. 37 , No. 5, November 2006, pp. 394-395.

LINKS

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

EXAMPLE

57.28996...

PROG

(PARI) tan(89*Pi/180) \\ Charles R Greathouse IV, Aug 27 2017

CROSSREFS

Cf. A073449, A019987.

Sequence in context: A154479 A153110 A099283 * A072097 A259070 A110937

Adjacent sequences:  A019984 A019985 A019986 * A019988 A019989 A019990

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Edited by N. J. A. Sloane, Aug 19 2008 at the suggestion of R. J. Mathar

STATUS

approved

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Last modified July 13 13:48 EDT 2020. Contains 335688 sequences. (Running on oeis4.)