.TH acos 1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
acos - element wise cosine inverse
.SH CALLING SEQUENCE
.nf
t=acos(x)
.fi
.SH PARAMETERS
.TP 10
x
: real or complex vector
.TP 10
t
: real or complex vector
.SH DESCRIPTION
The components of vector \fVt\fR are cosine inverse of the 
corresponding entries of vector \fVx\fR.
Definition domain is [-1, 1].
.LP
\fVacos\fR takes values in :
.IG
.nf
    ] 0,pi[ x ]-inf +inf[
    [0] x [0,+inf] and [pi] x ]-inf,0]   (real x imag)
.fi
.FI
\" This is for LaTeX 
.LA    $$ ] 0,\pi[ \times ]-\infty +\infty[ $$
.LA    $$ [0] \times [0,+\infty] \quad\mbox{and} 
.LA   \quad [\pi] \times ]-\infty,0] \quad \mbox{(real x imag)} $$
.SH EXAMPLE
.nf
x=[1,%i,-1,-%i]
cos(acos(x))
.fi