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 A019821 Decimal expansion of sine of 12 degrees. 3
 2, 0, 7, 9, 1, 1, 6, 9, 0, 8, 1, 7, 7, 5, 9, 3, 3, 7, 1, 0, 1, 7, 4, 2, 2, 8, 4, 4, 0, 5, 1, 2, 5, 1, 6, 6, 2, 1, 6, 5, 8, 4, 7, 6, 0, 6, 2, 7, 7, 2, 3, 8, 3, 6, 4, 0, 7, 1, 8, 1, 9, 7, 3, 8, 8, 2, 3, 8, 2, 8, 2, 5, 6, 6, 4, 0, 7, 4, 3, 7, 6, 3, 0, 4, 6, 2, 8, 7, 5, 6, 7, 2, 2, 7, 2, 7, 5, 7, 3 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS An algebraic number of degree 8 and denominator 2. - Charles R Greathouse IV, Aug 27 2017 LINKS Ivan Panchenko, Table of n, a(n) for n = 0..1000 Wikipedia, Exact trigonometric constants, Wikipedia FORMULA Equals sin(Pi/15) = sqrt(1-A019887^2) = [sqrt(5)-1]*[sqrt{5+2*sqrt(5)}-sqrt(3)]/8 - R. J. Mathar, Jun 18 2006 PROG (PARI) sin(Pi/15) \\ Charles R Greathouse IV, Aug 27 2017 CROSSREFS Sequence in context: A211113 A011389 A021485 * A016631 A164269 A293265 Adjacent sequences:  A019818 A019819 A019820 * A019822 A019823 A019824 KEYWORD nonn,cons AUTHOR STATUS approved

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Last modified May 25 15:24 EDT 2019. Contains 323572 sequences. (Running on oeis4.)