mirror of https://github.com/mkerrisk/man-pages
33 lines
814 B
Groff
33 lines
814 B
Groff
.\" Copyright 2002 Walter Harms(walter.harms@informatik.uni-oldenburg.de)
|
|
.\" Distributed under GPL
|
|
.\"
|
|
.TH CACOSH 3 2002-07-28 "" "complex math routines"
|
|
.SH NAME
|
|
cacosh, cacoshf, cacoshl \- complex arc hyperbolic cosine
|
|
.SH SYNOPSIS
|
|
.B #include <complex.h>
|
|
.sp
|
|
.BI "double complex cacosh(double complex " z );
|
|
.br
|
|
.BI "float complex cacoshf(float complex " z );
|
|
.br
|
|
.BI "long double complex cacoshl(long double complex " z );
|
|
.sp
|
|
Link with \-lm.
|
|
.SH DESCRIPTION
|
|
The
|
|
.BR cacosh ()
|
|
function calculates the complex acosh().
|
|
If y = cacosh(z), then z = ccosh(y).
|
|
The imaginary part of y is chosen in the interval [\-pi,pi].
|
|
The real part of y is chosen nonnegative.
|
|
.LP
|
|
One has cacosh(z) = (0.5)*clog((1+z)/(1\-z)).
|
|
.SH "CONFORMING TO"
|
|
C99
|
|
.SH "SEE ALSO"
|
|
.BR acosh (3),
|
|
.BR cabs (3),
|
|
.BR cimag (3),
|
|
.BR complex (5)
|