﻿功能:求反双曲余切值

格式:Acoth(z)、Acoth2(z)

说明:z为一个复数变量,其求解的是z的反双曲余切值,即
Acoth(z)={log<算式解析\log>}[((1+z)/(z-1))^0.5]
Acoth2(z)={log<算式解析\log>}[-((1+z)/(z-1))^0.5]
即{Coth<算式解析\coth>}(Acoth(z))=z、{Coth<算式解析\coth>}(Acoth2(z))=z

例子:
a=acoth(1.5+3i)
a = 0.124988987882272 - 0.264794799391038i
b=acoth2(1.5+3i)
b = 0.124988987882272 + 2.87679785419876i
{Coth<算式解析\coth>}(a)
ans = 1.5 + 3i
{Coth<算式解析\coth>}(b)
ans = 1.5 + 3i