OFFSET
0,1
COMMENTS
The maximum value of sin(A)*sin(B)*sin(C)/(A*B*C), where A, B and C are the vertex angles of a triangle (Abi-Khuzam, 1974). - Amiram Eldar, Jun 27 2021
LINKS
Faruk Abi-Khuzam, Proof of Yff's conjecture on the Brocard angle of a triangle, Elem. Math., Vol. 29 (1974), pp. 141-142.
Eric Weisstein's World of Mathematics, Abi-Khuzam Inequality.
EXAMPLE
0.56559562463613111310...
MATHEMATICA
RealDigits[(81Sqrt[3])/(8Pi^3), 10, 120][[1]] (* Harvey P. Dale, Apr 15 2012 *)
PROG
(PARI) 81*sqrt(3)/8/Pi^3 \\ Charles R Greathouse IV, Oct 01 2022
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Eric W. Weisstein, Jan 08 2007
STATUS
approved