acosh calculates the arccosine.
Return Value
r is the arccosine of the matrix m.
Parameters
m is a real or complex matrix.
Comment
Algorithm: -1i .* log (x + sqrt (x .* x - 1)).
-1i .* log (x + sqrt (x .* x - 1))
See also
Overview Mathematic, cos, acosh
id-1076924
abs
acosh