acosh(1)

NAME
acosh - hyperbolic cosine inverse

CALLING SEQUENCE
[t]=acosh(x)

PARAMETERS

x   : real or complex vector

t   : real or complex vector

DESCRIPTION
the components of vector t are the ArgCosh of the corresponding entries of vector x. Definition domain is ]1,+infinity[. It takes his values in
     ]0,+inf[ x ]-pi,pi] and  [0] x [0,pi]