A019874 - OEIS

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A019874

Decimal expansion of sine of 65 degrees.

5

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

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OFFSET

0,1

COMMENTS

An algebraic number of degree 12 and denominator 2. - Charles R Greathouse IV, Nov 06 2017

LINKS

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

Index entries for algebraic numbers, degree 12

FORMULA

Equals cos(5*Pi/36) = 2F1(17/24,7/24;1/2;3/4) / 2. - R. J. Mathar, Oct 27 2008

Equals A019861 * A019886 + A019822 * A019847 = A010527 * A019894 + A019814*(1/2). - R. J. Mathar, Jan 27 2021

MATHEMATICA

RealDigits[Sin[65 Degree], 10, 120][[1]] (* Harvey P. Dale, Oct 29 2020 *)

PROG

(PARI) sin(13/36*Pi) \\ Charles R Greathouse IV, Nov 06 2017

CROSSREFS

Sequence in context: A372270 A188738 A199789 * A197520 A068467 A372392

Adjacent sequences: A019871 A019872 A019873 * A019875 A019876 A019877

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane

STATUS

approved