cohavercosine | hacoversed cosine

The hacovercosine, also known as the hacoversed cosine and cohavercosine, is a little-used trigonometric function defined by hacovercos(z) | congruent | covercos z | = | 1/2(1 + sin z), where covercos z is the covercosine and sin z is the sine.

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