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 A019849 Decimal expansion of sine of 40 degrees. 2
 6, 4, 2, 7, 8, 7, 6, 0, 9, 6, 8, 6, 5, 3, 9, 3, 2, 6, 3, 2, 2, 6, 4, 3, 4, 0, 9, 9, 0, 7, 2, 6, 3, 4, 3, 2, 9, 0, 7, 5, 5, 9, 8, 8, 4, 2, 0, 5, 6, 8, 1, 7, 9, 0, 3, 2, 4, 9, 7, 7, 2, 5, 4, 6, 7, 1, 1, 1, 2, 8, 3, 6, 2, 4, 0, 9, 5, 8, 6, 3, 9, 7, 1, 0, 4, 8, 8, 2, 2, 7, 7, 1, 7, 5, 9, 4, 3, 5, 1 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS This sequence is also decimal expansion of cosine of 50 degrees. - Mohammad K. Azarian, Jun 29 2013 A sextic number with denominator 2. - Charles R Greathouse IV, Nov 05 2017 LINKS Ivan Panchenko, Table of n, a(n) for n = 0..1000 FORMULA Equals cos(5*pi/18) = 2F1(11/12,1/12;1/2;3/4) / 2 . - R. J. Mathar, Oct 27 2008 MATHEMATICA RealDigits[ Sin[ 2Pi/9], 10, 111][[1]] (* Robert G. Wilson v *) RealDigits[Sin[40 Degree], 10, 120][[1]] (* Harvey P. Dale, Mar 27 2015 *) PROG (PARI) sin(2/9*Pi) \\ Charles R Greathouse IV, Nov 05 2017 CROSSREFS Sequence in context: A145011 A173625 A086036 * A244685 A118421 A158233 Adjacent sequences:  A019846 A019847 A019848 * A019850 A019851 A019852 KEYWORD nonn,cons AUTHOR STATUS approved

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Last modified April 6 12:19 EDT 2020. Contains 333273 sequences. (Running on oeis4.)