Hacoversine
From specialfunctionswiki
The hacoversine function $\mathrm{hacoversin} \colon \mathbb{C} \rightarrow \mathbb{C}$ is defined by $$\mathrm{hacoversin}(z) = \dfrac{1-\sin(z)}{2},$$ where $\sin$ denotes sine.
The hacoversine function $\mathrm{hacoversin} \colon \mathbb{C} \rightarrow \mathbb{C}$ is defined by $$\mathrm{hacoversin}(z) = \dfrac{1-\sin(z)}{2},$$ where $\sin$ denotes sine.
