Assertion: tan's work | /r/HasProperty | finished by rheticusstudent valentin otho
Facets:
value: in 1596
type: TEMPORAL
Source sentences:
text: The Opus palatinum de triangulis of Georg Joachim Rheticus, a student of Copernicus, was probably the first in Europe to define trigonometric functions directly in terms of right triangles instead of circles, with tables for all six trigonometric functions; this work was finished by Rheticus' student Valentin Otho in 1596.