English Title
An easy method for computing the natural and artificial sines and tangents of angles
Enestrom Number
128
Fuss Index
328
Original Language
Latin
Content Summary
Euler considers a kind of "shifted" sum of reciprocal squares, 1/(1±p) ± 1/(4±p) ± 1/(9±p) ± 1/(16±p) ± .... He uses this to evaluate some sines, cosines, log sines, log cosines, tangents, and cotangents to 20 decimal places.
Published as
Journal article
Published Date
1750
Written Date
1739
Original Source Citation
Commentarii academiae scientiarum Petropolitanae, Volume 11, pp. 194-230.
Opera Omnia Citation
Series 1, Volume 14, pp.364-406.
Record Created
2018-09-25
