C⁡(z)+ⅈ⁢S⁡(z)=z⁢M⁡(12,32,12⁢π⁢ⅈ⁢z2)=z⁢ⅇπ⁢ⅈ⁢z2/2⁢M⁡(1,32,-12⁢π⁢ⅈ⁢z2).