acos(1)

NAME
acos - cosine inverse

CALLING SEQUENCE
[t]=acos(x)

PARAMETERS

x   : real or complex vector

t   : real or complex vector

DESCRIPTION
The components of vector t are cosine inverse of the corresponding entries of vector x. Definition domain is [-1, 1].

acos takes values in :
    ] 0,pi[ x ]-inf +inf[
    [0] x [0,+inf] and [pi] x ]-inf,0]   (real x imag)