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.\" $OpenBSD: cexp.3,v 1.2 2013/06/05 03:40:26 tedu Exp $
.\"
.\" Copyright (c) 2011 Martynas Venckus <martynas@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: June 5 2013 $
.Dt CEXP 3
.Os
.Sh NAME
.Nm cexp ,
.Nm cexpf ,
.Nm cexpl
.Nd complex exponential functions
.Sh SYNOPSIS
.In complex.h
.Ft double complex
.Fn cexp "double complex z"
.Ft float complex
.Fn cexpf "float complex z"
.Ft long double complex
.Fn cexpl "long double complex z"
.Sh DESCRIPTION
The
.Fn cexp ,
.Fn cexpf
and
.Fn cexpl
functions compute the exponential of
.Fa z .
.Pp
If
.Fa z
= x + iy, then
.Bd -literal -offset indent
cexp(z) = exp(x) cos(y) + i exp(x) sin(y).
.Ed
.Sh RETURN VALUES
The
.Fn cexp ,
.Fn cexpf
and
.Fn cexpl
functions return the exponential of
.Fa z .
.Sh SEE ALSO
.Xr clog 3 ,
.Xr cpow 3
.Sh STANDARDS
The
.Fn cexp ,
.Fn cexpf
and
.Fn cexpl
functions conform to
.St -isoC-99 .
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