Versine
1 minus the cosine of an angle / From Wikipedia, the free encyclopedia
For the archaic unit of mass, see Versine in WP:de.
"versin" redirects here. For the Polish village, see Versin (village).
The versine or versed sine is a trigonometric function found in some of the earliest (Sanskrit Aryabhatia,[1] Section I) trigonometric tables. The versine of an angle is 1 minus its cosine.
There are several related functions, most notably the coversine and haversine. The latter, half a versine, is of particular importance in the haversine formula of navigation.