A343059 Decimal expansion of tan(Pi/14).

2, 2, 8, 2, 4, 3, 4, 7, 4, 3, 9, 0, 1, 4, 9, 9, 3, 8, 0, 7, 7, 6, 1, 1, 3, 6, 2, 0, 6, 1, 0, 1, 4, 7, 8, 2, 7, 3, 8, 7, 8, 1, 6, 8, 0, 9, 8, 0, 3, 5, 2, 6, 3, 7, 9, 7, 9, 6, 8, 8, 9, 1, 9, 6, 0, 3, 8, 2, 4, 8, 5, 5, 7, 1, 3, 8, 8, 1, 8, 7, 8, 9, 1, 4, 6, 9, 3, 8, 7, 0, 3, 7, 7, 1, 5, 5, 5, 6, 8, 2, 6, 0, 2, 7, 1, 5, 9, 7, 1, 7, 3, 5, 3, 4, 2, 5, 3, 8, 7

Offset: 0

Author

Seiichi Manyama, Apr 04 2021

Keywords

• nonn
• cons
• easy

Comments

Root of the equation -1 + 21*x^2 - 35*x^4 + 7*x^6 = 0. - Vaclav Kotesovec, Apr 04 2021

Examples

			0.228243474390149938077611362061014782...
		

Links

• G. C. Greubel, Table of n, a(n) for n = 0..10000
• Index entries for algebraic numbers, degree 6.

Crossrefs

Cf. A232736 (sin(Pi/14)), A232735 (cos(Pi/14)).

Programs

Mathematica

RealDigits[Tan[Pi/14], 10, 125][[1]] (* Amiram Eldar, Apr 27 2021 *)

PARI

tan(Pi/14)

SageMath

numerical_approx(tan(pi/14), digits=124) # G. C. Greubel, Sep 30 2022