﻿功能:求反余切值

格式:Acot(z)、Acot2(z)

说明:z为一个复数变量,其求解的是z的反余切值,即
Acot(z)=-i*{log<算式解析\log>}([(z+i)/(z-i)]^0.5)
Acot2(z)=-i*{log<算式解析\log>}(-[(z+i)/(z-i)]^0.5)
即{Cot<算式解析\cot>}(Acot(z))=z、{Cot<算式解析\cot>}(Acot2(z))=z

例子:

a=acot(4-5i)//回车
a = 0.0986977799249404 + 0.121376953945425i

b={Cot<算式解析\cot>}(a)//回车
b = 4 - 5i