A019883 Decimal expansion of sine of 74 degrees.

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, 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, 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

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Comments

Equals sin(37*Pi/90). - Wesley Ivan Hurt, Sep 01 2014

An algebraic number of degree 12 and denominator 2. - Charles R Greathouse IV, Nov 06 2017

Examples

			0.9612616959383188619164970485570648735256924893407086658...
		

Links

• Ivan Panchenko, Table of n, a(n) for n = 0..1000
• Index entries for algebraic numbers, degree 12

Programs

Maple

Digits:=100: evalf(sin(37*Pi/90)); # Wesley Ivan Hurt, Sep 01 2014

Mathematica

First@RealDigits[Sin[74 Degree], 10, 120] (* Michael De Vlieger, Aug 31 2014 *)

PARI

cos(4*Pi/45) \\ Charles R Greathouse IV, Nov 06 2017

Formula

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

Equals 2*A019846*A019862. - R. J. Mathar, Jan 17 2021