OFFSET
1,2
FORMULA
From Amiram Eldar, May 30 2021: (Start)
Equals Pi/2 - A195784.
Equals arcsin(3*sqrt(7)/8) = arccos(1/8) = arctan(3*sqrt(7)). (End)
EXAMPLE
arcsec(8)=1.44546849562683122235675470528266672405043697284888...
MATHEMATICA
(See A195781.)
RealDigits[ArcSec[8], 10, 120][[1]] (* Harvey P. Dale, May 08 2023 *)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 24 2011
STATUS
approved