Definitions
from Wiktionary, Creative Commons Attribution/ShareAlike License
 n. The haversed sine.
from The Century Dictionary and Cyclopedia
 n. In navigation, half the versed sine. The word was introduced by James Inman in the 1835 edition of his “Navigation.”
Etymologies
Sorry, no etymologies found.
Examples

T.e result will be the log haversine of the S.H.A. or L.A.T. It must always be less than 10.

With the log haversine S enter table 45 in the adjacent parallel column, take out the corresponding Natural Haversine, which mark N_ .

(Table 44), and the log cosine of the Dec. (Table 44) and call the sum S. S.is a log haversine and must always be less than

Add together the log haversine of the S.H.A. (Table 45), the log cosine of the Lat.

Commonly used waveforms that are preprogrammed into the software include sin (x)/x, exponential riseandfall, logarithmic riseandfall, Gaussian, Lorentz, haversine and cardiac waveforms.

I still have in a basement file cabinet my copy of Bowditch with its haversine tables.

Like its cousin the haversine, the hacoversine is mainly useful for doing trig on a sphere when you don't have a calculator handy to square the familiar trig functions.

The haversine has its own twin, the havercosine, which is the vercosine divided by 2.

+v direction so that the result is either +v or  v. The haversine gives the probability that the result of the measurement is  v. The way I learned about sine and cosine (sinus and cosinus we call them) they were defined from a rightangled triangle.
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