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%I #29 Aug 21 2023 11:51:29
%S 6,2,9,3,2,0,3,9,1,0,4,9,8,3,7,4,5,2,7,0,5,9,0,2,4,5,8,2,7,9,9,7,0,4,
%T 2,6,5,6,6,8,6,2,4,1,2,1,2,9,8,6,6,6,3,9,4,6,0,3,2,8,0,2,5,7,8,0,7,5,
%U 3,0,0,9,9,8,7,2,1,3,6,3,6,7,2,4,6,4,6,9,4,6,6,0,6,8,9,9,9,8,9
%N Decimal expansion of sine of 39 degrees.
%C This sequence is also decimal expansion of cosine of 51 degrees. - _Mohammad K. Azarian_, Jun 29 2013
%C An algebraic number of degree 16 and denominator 2. - _Charles R Greathouse IV_, Nov 05 2017
%H Ivan Panchenko, <a href="/A019848/b019848.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_16">Index entries for algebraic numbers, degree 16</a>
%F Equals A019835*A019886 + A019822*A019873 = A019845*A019896 + A019812*A019863. - _R. J. Mathar_, Jan 27 2021
%t RealDigits[Sin[39 Degree],10,120][[1]] (* _Harvey P. Dale_, Oct 02 2015 *)
%o (PARI) sin(13/60*Pi) \\ _Charles R Greathouse IV_, Nov 05 2017
%Y Cf. A019812, A019822, A019835, A019845, A019886, A019873, A019896, A019863.
%K nonn,cons
%O 0,1
%A _N. J. A. Sloane_
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