ACOSH

Member Of Menu: 
Logs
Argument Types: 
Real
Complex
Symbol
Expression
Result Type(s): 
Real
Complex
Expression
Invertible: 
Yes
Valid In Expression: 
Yes
Stack Diagram: 
Real1 Real2
Real1 Complex2
Complex1 Complex2
Symbol1 Expression2
Expression1 Expression2

This operation calculates the inverse hyperbolic cosine function of its input argument. It takes real or complex input values. Note that if its real argument is less than 1, the result will be complex.