OFFSET
1,2
COMMENTS
Also the decimal expansion of cotangent of 39 degrees. - Ivan Panchenko, Sep 01 2014
LINKS
Ivan Panchenko, Table of n, a(n) for n = 1..1000
Wikipedia, Exact trigonometric constants
FORMULA
Equals cot(13*Pi/60) = ((2+sqrt(3))*(3-sqrt(5)) -2)*(2 + sqrt(2*(5 + sqrt(5))))/4. - G. C. Greubel, Nov 23 2018
EXAMPLE
1.2348971565350513985561746953759351400536255840779765364212592...
MATHEMATICA
RealDigits[Tan[17*Pi/60], 10, 100][[1]] (* G. C. Greubel, Nov 23 2018 *)
RealDigits[Tan[51 Degree], 10, 120][[1]] (* Harvey P. Dale, Jan 18 2021 *)
PROG
(PARI) default(realprecision, 100); tan(17*Pi/60) \\ G. C. Greubel, Nov 23 2018
(Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Tan(17*Pi(R)/60); // G. C. Greubel, Nov 23 2018
(Sage) numerical_approx(tan(17*pi/60), digits=100) # G. C. Greubel, Nov 23 2018
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
STATUS
approved