OFFSET
0,1
COMMENTS
The Brocard angle in radians 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
Eric Weisstein's World of Mathematics, Brocard Angle.
FORMULA
arctan(3*sqrt(15)/29) = arctan(4*A140239/29) = arcsin(3*sqrt(915)/244) = arccos(29*sqrt(61)/244).
EXAMPLE
0.38106956877756026908149342379874213938224647938776469222831569013225470496...
MATHEMATICA
RealDigits[ArcTan[(3Sqrt[15])/29], 10, 120][[1]] (* Harvey P. Dale, Aug 24 2019 *)
PROG
(PARI) atan(3*sqrt(15)/29)
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
Rick L. Shepherd, May 16 2008, Jul 18 2008
STATUS
approved