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+.\" Copyright (c) 2011 David Schultz <das@FreeBSD.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd October 17, 2011
+.Dt CCOS 3
+.Os
+.Sh NAME
+.Nm ccos ,
+.Nm ccosf ,
+.Nm csin ,
+.Nm csinf
+.Nm ctan ,
+.Nm ctanf
+.Nd complex trigonometric functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In complex.h
+.Ft double complex
+.Fn ccos "double complex z"
+.Ft float complex
+.Fn ccosf "float complex z"
+.Ft double complex
+.Fn csin "double complex z"
+.Ft float complex
+.Fn csinf "float complex z"
+.Ft double complex
+.Fn ctan "double complex z"
+.Ft float complex
+.Fn ctanf "float complex z"
+.Sh DESCRIPTION
+The
+.Fn ccos ,
+.Fn csin ,
+and
+.Fn ctan
+functions compute the cosine, sine, and tangent of the complex number
+.Fa z ,
+respectively.
+The
+.Fn ccosf ,
+.Fn csinf ,
+and
+.Fn ctanf
+functions perform the same operations in
+.Fa float
+precision.
+.Sh SEE ALSO
+.Xr ccosh 3 ,
+.Xr complex 3 ,
+.Xr cos 3 ,
+.Xr math 3 ,
+.Xr sin 3 ,
+.Xr tan 3
+.Sh STANDARDS
+These functions conform to
+.St -isoC-99 .