OFFSET
-2,1
COMMENTS
This constant appears in a historic problem posed by Adriaan van Roomen (Adrianus Romanus) in his Ideae mathematicae from 1593, solved by Viète. See the Havil reference, problem 4, pp. 69-74. See also the comments, references and links in A302711.
REFERENCES
Julian Havil, The Irrationals, A Story of the Numbers You Can't Count On, Princeton University Press, Princeton and Oxford, 2012, pp. 69-74.
FORMULA
This constant is 2*sin(Pi/675).
EXAMPLE
0.0093083890713223248278454073630973484911817874590184488122045378391206664762...
MATHEMATICA
RealDigits[2 Sin[Pi/675], 10, 111][[1]] (* Robert G. Wilson v, Apr 29 2018 *)
PROG
(PARI) 2*sin(Pi/675) \\ Altug Alkan, May 01 2018
CROSSREFS
KEYWORD
AUTHOR
Wolfdieter Lang, Apr 29 2018
STATUS
approved