|
|
A140273
|
|
Decimal expansion of 180*arctan(3*sqrt(15)/29)/Pi.
|
|
1
|
|
|
2, 1, 8, 3, 3, 6, 7, 7, 9, 9, 1, 8, 2, 4, 4, 5, 2, 1, 0, 0, 3, 8, 5, 0, 6, 1, 7, 6, 0, 0, 5, 4, 5, 7, 1, 7, 9, 5, 9, 8, 2, 9, 3, 5, 4, 1, 0, 3, 8, 2, 3, 8, 3, 6, 0, 6, 1, 5, 8, 8, 0, 2, 1, 9, 6, 0, 4, 8, 5, 2, 2, 4, 4, 6, 0, 9, 0, 7, 9, 6, 3, 0, 8, 8, 6, 5, 4, 1, 9, 2, 2, 8, 3, 0, 2, 0, 0, 2, 5, 8, 7, 9, 4, 1, 2
(list;
constant;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
2,1
|
|
COMMENTS
|
The Brocard angle in degrees of the obtuse scalene triangle with sides of lengths 2, 3 and 4, the scalene triangle with least integer side lengths. See formulas in the Weisstein link.
|
|
LINKS
|
|
|
FORMULA
|
180*arctan(3*sqrt(15)/29)/Pi = 180*A140272/Pi = 180*arctan(4*A140239/29)/Pi.
|
|
EXAMPLE
|
21.8336779918244521003850617600545717959829354103823836061588021960485224460...
|
|
MATHEMATICA
|
RealDigits[180 ArcTan[(3Sqrt[15])/29]/Pi, 10, 120][[1]] (* Harvey P. Dale, Dec 15 2012 *)
|
|
PROG
|
(PARI) 180*atan(3*sqrt(15)/29)/Pi
|
|
CROSSREFS
|
|
|
KEYWORD
|
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|