Antoine Deparcieux Carl Anton Bretschneider Joseph-Alfred Serret Antoine André Louis Reynaud Cathérine Jami Mathieu Weill Georg Simon Klügel Karl Scherffer Karl Gustav Reuschle Siegmund Günther Anton von Braunmühl Jean-François Callet Grace Chisholm Young Trigon (German band) Wilhelm Fuhrmann Jacques Ozanam Gerhard Hessenberg Friedrich Schilling Heinrich Suter Thomas Street (astronomer) Spherical geometry Eberhard Knobloch Lexell's theorem Hansen's problem Clime Thomas Bugge August von Jilek Mercator series Bernt Michael Holmboe Johann Friedrich Schultz Richard Norwood Eduard Study History of trigonometry Trigonomet…

tric functions Exact trigonometric values Madhava series Versine Meridian arc Abraham de Moivre Chinese mathematics Geodesics on an ellipsoid Sylvestre François Lacroix Age of the captain Interlingue grammar