login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A019875 Decimal expansion of sine of 66 degrees. 1
9, 1, 3, 5, 4, 5, 4, 5, 7, 6, 4, 2, 6, 0, 0, 8, 9, 5, 5, 0, 2, 1, 2, 7, 5, 7, 1, 9, 8, 5, 3, 1, 7, 1, 7, 7, 9, 4, 0, 8, 1, 0, 4, 5, 9, 3, 7, 7, 4, 7, 4, 5, 4, 5, 0, 6, 0, 9, 9, 9, 7, 8, 8, 0, 6, 5, 1, 1, 4, 8, 8, 2, 1, 0, 2, 6, 3, 1, 2, 7, 1, 6, 8, 1, 7, 8, 4, 0, 0, 0, 8, 9, 3, 2, 9, 9, 9, 9, 4 (list; constant; graph; refs; listen; history; internal format)
OFFSET

0,1

LINKS

Anonymous, Exact trigonometric constants, Wikipedia

FORMULA

Equals cos(2*Pi/15) = 2* A019887^2 -1= 1-2*A019821^2 . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 18 2006

CROSSREFS

Sequence in context: A198835 A010167 A154181 * A198819 A176520 A011462

Adjacent sequences:  A019872 A019873 A019874 * A019876 A019877 A019878

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 07:16 EST 2012. Contains 205589 sequences.