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 A019830 Decimal expansion of sine of 21 degrees. 1
 3, 5, 8, 3, 6, 7, 9, 4, 9, 5, 4, 5, 3, 0, 0, 2, 7, 3, 4, 8, 4, 1, 3, 7, 7, 8, 9, 4, 1, 3, 4, 6, 6, 8, 3, 4, 1, 9, 1, 5, 4, 4, 4, 4, 9, 4, 6, 0, 0, 1, 3, 7, 9, 5, 4, 6, 3, 5, 7, 6, 7, 7, 5, 8, 5, 7, 3, 1, 9, 9, 2, 5, 9, 8, 2, 4, 9, 9, 0, 9, 8, 9, 8, 7, 3, 1, 6, 0, 9, 1, 3, 9, 2, 9, 8, 6, 7, 8, 9 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Ivan Panchenko, Table of n, a(n) for n = 0..1000 Wikipedia, Exact trigonometric constants MATHEMATICA RealDigits[Sin[21 Degree], 10, 120][[1]] (* Harvey P. Dale, Apr 06 2016 *) PROG (PARI) sin(7*Pi/60) \\ Charles R Greathouse IV, Jan 30 2016 CROSSREFS Sequence in context: A181918 A010617 A016659 * A259238 A094355 A087334 Adjacent sequences:  A019827 A019828 A019829 * A019831 A019832 A019833 KEYWORD nonn,cons AUTHOR STATUS approved

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