About: http://webisa.webdatacommons.org/238348382

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Degrees works just as well.sin(x)/sin(y) is only rational when x = 180*n or x = 360*n*y, where n is an integer.
http://www.w3.org/ns/prov#wasQuotedFrom	mathisfunforum.com