Historic Shorthands
The versine, coversine, haversine, and exsecant were used in navigation. For example the haversine formula was used to calculate the distance between two points on a sphere. They are rarely used today.
| Name(s) | Abbreviation(s) | Value |
|---|---|---|
| versed sine, versine | ||
| versed cosine, vercosine | ||
| coversed sine, coversine | ||
| coversed cosine, covercosine | ||
| half versed sine, haversine | ||
| half versed cosine, havercosine | ||
| half coversed sine, hacoversine cohaversine |
||
| half coversed cosine, hacovercosine cohavercosine |
||
| exterior secant, exsecant | ||
| exterior cosecant, excosecant | ||
| chord |
Read more about this topic: List Of Trigonometric Identities
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“If there is any period one would desire to be born in, is it not the age of Revolution; when the old and the new stand side by side, and admit of being compared; when the energies of all men are searched by fear and by hope; when the historic glories of the old can be compensated by the rich possibilities of the new era?”
—Ralph Waldo Emerson (1803–1882)
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