The versine or versed sine is a trigonometric function found in some of the earliest (Sanskrit Aryabhatiya,

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.

thumb|190px|A [[unit circle with trigonometric functions.

References

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Further reading

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  • Trigonometric Functions at GeoGebra.org