co-versed sine

coversed sine

[koh-vurst]
noun Mathematics.
the versed sine of the complement of an angle or arc.
Also called coversine, versed cosine.


Origin:
1700–10

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
coversed sine (ˈkəʊvɜːst)
 
n
covers a trigonometric function equal to one minus the sine of the specified angle

Collins English Dictionary - Complete & Unabridged 10th Edition
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