OFFSET
1,1
COMMENTS
Also the decimal expansion of cotangent of 20 degrees. - Ivan Panchenko, Sep 01 2014
An algebraic number of degree 6 and denominator 3. - Charles R Greathouse IV, Aug 27 2017
LINKS
EXAMPLE
2.7474774194546222787616640264976727177518725991708258215...
MATHEMATICA
RealDigits[Tan[7*Pi/18], 10, 100][[1]] (* G. C. Greubel, Nov 21 2018 *)
PROG
(PARI) tan(7*Pi/18) \\ Charles R Greathouse IV, Aug 27 2017
(Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Tan(7*Pi(R)/18); // G. C. Greubel, Nov 21 2018
(Sage) numerical_approx(tan(7*pi/18), digits=100) # G. C. Greubel, Nov 21 2018
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
STATUS
approved