出典:Wiktionary
出典:『Wiktionary』 (2024/11/10 03:53 UTC 版)
versine (plural versines)
出典:Wikipedia
出典:『Wikipedia』 (2011/04/23 19:26 UTC 版)
The versine or versed sine, versin(θ), is a trigonometric function equal to 1 − cos(θ) and 2sin2(½θ). It appeared in some of the earliest trigonometric tables and was once widespread, but it is now little-used. There are several related functions, most notably the haversine, half the versine, known in the haversine formula of navigation.