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%I #13 Nov 21 2024 07:58:56
%S 1,4,4,5,4,6,8,4,9,5,6,2,6,8,3,1,2,2,2,3,5,6,7,5,4,7,0,5,2,8,2,6,6,6,
%T 7,2,4,0,5,0,4,3,6,9,7,2,8,4,8,8,8,0,5,3,5,2,5,3,5,0,8,2,6,5,1,6,7,4,
%U 1,4,7,6,3,8,2,9,2,6,0,5,2,9,9,2,9,6,5,5,2,2,1,8,7,8,2,0,2,6,0,7
%N Decimal expansion of arcsec(8).
%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%F From _Amiram Eldar_, May 30 2021: (Start)
%F Equals Pi/2 - A195784.
%F Equals arcsin(3*sqrt(7)/8) = arccos(1/8) = arctan(3*sqrt(7)). (End)
%e arcsec(8)=1.44546849562683122235675470528266672405043697284888...
%t (See A195781.)
%t RealDigits[ArcSec[8],10,120][[1]] (* _Harvey P. Dale_, May 08 2023 *)
%o (PARI) acos(1/8) \\ _Charles R Greathouse IV_, Nov 21 2024
%Y Cf. A195781, A195784.
%K nonn,cons
%O 1,2
%A _Clark Kimberling_, Sep 24 2011