2004-11-03 13:51:07 +00:00
|
|
|
.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
|
|
|
|
|
.\" Distributed under GPL
|
|
|
|
|
.\"
|
|
|
|
|
.TH CACOS 3 2002-07-28 "" "complex math routines"
|
|
|
|
|
.SH NAME
|
|
|
|
|
cacos, cacosf, cacosl \- complex arc cosine
|
|
|
|
|
.SH SYNOPSIS
|
|
|
|
|
.B #include <complex.h>
|
|
|
|
|
.sp
|
|
|
|
|
.BI "double complex cacos(double complex " z );
|
2004-11-11 17:28:42 +00:00
|
|
|
.br
|
2004-11-03 13:51:07 +00:00
|
|
|
.BI "float complex cacosf(float complex " z );
|
2004-11-11 17:28:42 +00:00
|
|
|
.br
|
2004-11-03 13:51:07 +00:00
|
|
|
.BI "long double complex cacosl(long double complex " z );
|
|
|
|
|
.sp
|
|
|
|
|
Link with \-lm.
|
|
|
|
|
.SH DESCRIPTION
|
2005-10-19 14:48:35 +00:00
|
|
|
The
|
|
|
|
|
.BR cacos ()
|
|
|
|
|
function calculates the complex acos().
|
2004-11-03 13:51:07 +00:00
|
|
|
If y = cacos(z), then z = ccos(y).
|
|
|
|
|
The real part of y is chosen in the interval [0,pi].
|
|
|
|
|
.LP
|
2005-07-06 07:41:37 +00:00
|
|
|
One has cacos(z) = \-i clog(z+csqrt(z*z-1)).
|
2004-11-03 13:51:07 +00:00
|
|
|
.SH "CONFORMING TO"
|
|
|
|
|
C99
|
|
|
|
|
.SH "SEE ALSO"
|
|
|
|
|
.BR ccos (3),
|
|
|
|
|
.BR clog (3),
|
|
|
|
|
.BR complex (5)
|
