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%I #25 Aug 21 2023 11:41:52
%S 4,5,3,9,9,0,4,9,9,7,3,9,5,4,6,7,9,1,5,6,0,4,0,8,3,6,6,3,5,7,8,7,1,1,
%T 9,8,9,8,3,0,4,7,7,0,3,0,4,9,0,2,1,5,5,6,9,8,5,3,1,6,0,0,5,8,2,2,0,2,
%U 6,7,8,4,1,3,1,8,5,2,4,2,8,7,5,4,4,7,3,4,3,9,2,2,1,9,4,6,7,9,7
%N Decimal expansion of sine of 27 degrees.
%C An algebraic number of degree 8 and denominator 2. - _Charles R Greathouse IV_, Aug 27 2017
%H Ivan Panchenko, <a href="/A019836/b019836.txt">Table of n, a(n) for n = 0..1000</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Trigonometric_constants_expressed_in_real_radicals">Trigonometric constants expressed in real radicals</a>
%H <a href="/index/Al#algebraic_08">Index entries for algebraic numbers, degree 8</a>
%F Equals A019827 * A019890 + A019818 * A019881 = A019833 * A019896 + A019812 * A019875. - _R. J. Mathar_, Jan 27 2021
%t RealDigits[Sin[27 Degree],10,120][[1]] (* _Harvey P. Dale_, Nov 09 2014 *)
%o (PARI) cos(7*Pi/20) \\ _Charles R Greathouse IV_, Aug 27 2017
%K nonn,cons
%O 0,1
%A _N. J. A. Sloane_
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