.\" Copyright (c) 1991, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" %sccs.include.redist.man%
.\"
.\"     @(#)tan.3	8.1 (Berkeley) 06/04/93
.\"
.Dd 
.Dt TAN 3
.Os
.Sh NAME
.Nm tan
.Nd tangent function
.Sh SYNOPSIS
.Fd #include <math.h>
.Ft double
.Fn tan "double x"
.Sh DESCRIPTION
The
.Fn tan
function computes the tangent of
.Fa x
(measured in radians).
A large magnitude argument may yield a result
with little or no significance.
For a discussion of error due to roundoff, see
.Xr math 3 .
.Sh RETURN VALUES
The
.Fn tan
function returns the tangent value.
.Sh SEE ALSO
.Xr acos 3 ,
.Xr asin 3 ,
.Xr atan 3 ,
.Xr atan2 3 ,
.Xr cos 3 ,
.Xr cosh 3 ,
.Xr sin 3 ,
.Xr sinh 3 ,
.Xr tanh 3 ,
.Xr math 3 ,
.Sh STANDARDS
The
.Fn tan
function conforms to
.St -ansiC .