OFFSET
1,2
FORMULA
Equals arcsin(5/sqrt(26)) = arccos(1/sqrt(26)). - Amiram Eldar, Jul 11 2023
EXAMPLE
arctan(5) = 1.373400766945015860861271926444961148650999...
MATHEMATICA
PROG
(PARI) atan(5) \\ Charles R Greathouse IV, Nov 20 2024
CROSSREFS
KEYWORD
AUTHOR
Clark Kimberling, Sep 24 2011
STATUS
approved