OFFSET
0,1
LINKS
FORMULA
Equals arcsin(sqrt(5/13)) = arccos(2*sqrt(2/13)). - Amiram Eldar, Jul 08 2023
EXAMPLE
arctan(sqrt(5/8)) = 0.6689640742...
MATHEMATICA
PROG
(PARI) atan(sqrt(5/8)) \\ G. C. Greubel, Aug 19 2018
(Magma) SetDefaultRealField(RealField(100)); Arctan(Sqrt(5/8)); // G. C. Greubel, Aug 19 2018
CROSSREFS
KEYWORD
AUTHOR
Clark Kimberling, Sep 23 2011
STATUS
approved