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A375192
Decimal expansion of the sagitta of a regular 11-gon with unit side length.
10
7, 1, 8, 8, 9, 1, 4, 6, 9, 9, 7, 4, 8, 6, 6, 5, 8, 3, 3, 2, 7, 6, 6, 7, 8, 7, 8, 4, 4, 5, 5, 1, 4, 3, 0, 1, 2, 6, 7, 2, 6, 3, 8, 9, 0, 6, 2, 1, 3, 6, 9, 9, 9, 0, 6, 3, 6, 1, 5, 9, 1, 2, 6, 2, 1, 3, 2, 3, 9, 6, 1, 3, 1, 2, 8, 7, 5, 9, 0, 1, 9, 0, 6, 3, 3, 8, 9, 6, 7, 9
OFFSET
-1,1
LINKS
Eric Weisstein's World of Mathematics, Regular Polygon.
Eric Weisstein's World of Mathematics, Sagitta
FORMULA
Equals tan(Pi/22)/2.
Equals A375190 - A375191.
EXAMPLE
0.0718891469974866583327667878445514301267263890621...
MATHEMATICA
First[RealDigits[Tan[Pi/22]/2, 10, 100]]
CROSSREFS
Cf. A375190 (circumradius), A375191 (apothem), A256854 (area).
Cf. sagitta of other polygons with unit side length: A020769 (triangle), A174968 (square), A375068 (pentagon), A375069 (hexagon), A374972 (heptagon), A375070 (octagon), A375153 (9-gon), A375189 (10-gon), A375194 (12-gon).
Sequence in context: A011100 A244382 A111293 * A019661 A200130 A298751
KEYWORD
nonn,cons,easy
AUTHOR
Paolo Xausa, Aug 04 2024
STATUS
approved