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.

Index entries for transcendental numbers

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 *)

Prog

(PARI) acos(1/8) \\ Charles R Greathouse IV, Nov 21 2024

Crossrefs

Cf. A195781, A195784.

Sequence in context: A226446 A158086 A364995 * A376178 A360997 A167770

Adjacent sequences: A195780 A195781 A195782 * A195784 A195785 A195786

Keyword

nonn,cons

Author

Clark Kimberling, Sep 24 2011

Status

approved