The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A019821 Decimal expansion of sine of 12 degrees. 3

%I

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

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

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

%N Decimal expansion of sine of 12 degrees.

%C An algebraic number of degree 8 and denominator 2. - _Charles R Greathouse IV_, Aug 27 2017

%H Ivan Panchenko, <a href="/A019821/b019821.txt">Table of n, a(n) for n = 0..1000</a>

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

%F Equals sin(Pi/15) = sqrt(1-A019887^2) = [sqrt(5)-1]*[sqrt{5+2*sqrt(5)}-sqrt(3)]/8 - _R. J. Mathar_, Jun 18 2006

%o (PARI) sin(Pi/15) \\ _Charles R Greathouse IV_, Aug 27 2017

%K nonn,cons

%O 0,1

%A _N. J. A. Sloane_.

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 27 06:03 EST 2020. Contains 332299 sequences. (Running on oeis4.)