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A019830 Decimal expansion of sine of 21 degrees. 1

%I

%S 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,

%T 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,

%U 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

%N Decimal expansion of sine of 21 degrees.

%H Ivan Panchenko, <a href="/A019830/b019830.txt">Table of n, a(n) for n = 0..1000</a>

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Exact_trigonometric_constants">Exact trigonometric constants</a>

%t RealDigits[Sin[21 Degree],10,120][[1]] (* _Harvey P. Dale_, Apr 06 2016 *)

%o (PARI) sin(7*Pi/60) \\ _Charles R Greathouse IV_, Jan 30 2016

%K nonn,cons

%O 0,1

%A _N. J. A. Sloane_.

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Last modified February 21 05:23 EST 2020. Contains 332086 sequences. (Running on oeis4.)