A195783 Decimal expansion of arcsec(8).

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, 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, 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

Offset

1,2

Links

Table of n, a(n) for n=1..100.

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

Cf. A195781, A195784.

Sequence in context: A226446 A158086 A364995 * A360997 A167770 A080800

Adjacent sequences: A195780 A195781 A195782 * A195784 A195785 A195786

Keyword

nonn,cons

Author

Clark Kimberling, Sep 24 2011

Status

approved