A019883 - OEIS

%I #23 Aug 21 2023 11:47:08

%S 9,6,1,2,6,1,6,9,5,9,3,8,3,1,8,8,6,1,9,1,6,4,9,7,0,4,8,5,5,7,0,6,4,8,

%T 7,3,5,2,5,6,9,2,4,8,9,3,4,0,7,0,8,6,6,5,8,5,6,6,8,5,3,0,0,1,5,4,3,7,

%U 1,5,1,5,7,4,7,6,7,6,5,3,0,3,5,2,3,9,6,8,1,3,6,0,5,3,5,7,1,8,1

%N Decimal expansion of sine of 74 degrees.

%C Equals sin(37*Pi/90). - _Wesley Ivan Hurt_, Sep 01 2014

%C An algebraic number of degree 12 and denominator 2. - _Charles R Greathouse IV_, Nov 06 2017

%H Ivan Panchenko, <a href="/A019883/b019883.txt">Table of n, a(n) for n = 0..1000</a>

%H <a href="/index/Al#algebraic_12">Index entries for algebraic numbers, degree 12</a>

%F Equals cos(4*Pi/45) = 2F1(19/30,11/30;1/2;3/4) / 2. - _R. J. Mathar_, Oct 27 2008

%F Equals 2*A019846*A019862. - _R. J. Mathar_, Jan 17 2021

%e 0.9612616959383188619164970485570648735256924893407086658...

%p Digits:=100: evalf(sin(37*Pi/90)); # _Wesley Ivan Hurt_, Sep 01 2014

%t First@RealDigits[Sin[74 Degree], 10, 120] (* _Michael De Vlieger_,

%t   Aug 31 2014 *)

%o (PARI) cos(4*Pi/45) \\ _Charles R Greathouse IV_, Nov 06 2017

%K nonn,cons

%O 0,1

%A _N. J. A. Sloane_