cohaversine | hacoversed sine

The hacoversine, also known as the hacoversed sine and cohaversine, is a little-used trigonometric function defined by hacoversin(z) | congruent | coversin z | = | 1/2(1 - sin z), where coversin z is the coversine and sin z is the sine.

covercosine | coversine | excosecant | exsecant | hacovercosine | havercosine | haversine | vercosine | versine