OFFSET
0,1
REFERENCES
L. V. Ahlfors, Complex Analysis, McGraw-Hill, 3rd ed., p. 44.
FORMULA
Equals sin(2)/(cos(2) + cosh(2)). - Peter Luschny, Apr 23 2024
EXAMPLE
.27175258531951171652884372249858892070946411146177945309808...
MATHEMATICA
First[RealDigits[Re[Tan[1 + I]], 10, 100]] (* Paolo Xausa, Apr 23 2024 *)
PROG
(PARI) real(tan(1+I)) \\ Charles R Greathouse IV, Mar 25 2014
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
N. J. A. Sloane, Feb 12 2010
STATUS
approved