The hacovercosine, also known as the hacoversed cosine and cohavercosine, is a little-used trigonometric function defined by
 |  |  |
(1)
|
 |  |  |
(2)
|
where 
is the covercosine and 
is the sine.
Hacovercosine
See also
Covercosine, Coversine, Excosecant, Exsecant, Hacoversine, Havercosine, Haversine, Vercosine, VersineExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Hacovercosine." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Hacovercosine.html