A019867 - OEIS

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A019867

Decimal expansion of sine of 58 degrees.

5

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

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OFFSET

0,1

COMMENTS

An algebraic number of degree 12 and denominator 2. - Charles R Greathouse IV, Aug 27 2017

LINKS

Ivan Panchenko, Table of n, a(n) for n = 0..1000

Index entries for algebraic numbers, degree 12

FORMULA

Equals cos(8*Pi/45) = 2F1(23/30,7/30;1/2;3/4) / 2. - R. J. Mathar, Oct 27 2008

Equals 2*A019838*A019870. - R. J. Mathar, Jan 17 2021

EXAMPLE

0.84804809...

MATHEMATICA

RealDigits[Sin[58 Degree], 10, 120][[1]] (* Harvey P. Dale, Apr 24 2018 *)

PROG

(PARI) cos(8*Pi/45) \\ Charles R Greathouse IV, Aug 27 2017

CROSSREFS

Sequence in context: A359837 A019684 A244210 * A144663 A197260 A155889

Adjacent sequences: A019864 A019865 A019866 * A019868 A019869 A019870

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane

STATUS

approved