xref: /freebsd/lib/msun/man/cos.3 (revision 3a8617a83f16ffc9db4f96e1f0f21af94078e6b1)

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.\"     from: @(#)cos.3	5.1 (Berkeley) 5/2/91
.\"	$Id: cos.3,v 1.5 1993/10/29 22:57:25 jtc Exp $
.\"
.Dd May 2, 1991
.Dt COS 3
.Os
.Sh NAME
.Nm cos
.Nd cosine function
.Sh SYNOPSIS
.Fd #include <math.h>
.Ft double
.Fn cos "double x"
.Sh DESCRIPTION
The
.Fn cos
function computes the cosine 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 cos
function returns the cosine value.
.Sh SEE ALSO
.Xr sin 3 ,
.Xr tan 3 ,
.Xr asin 3 ,
.Xr acos 3 ,
.Xr atan 3 ,
.Xr atan2 3 ,
.Xr sinh 3 ,
.Xr cosh 3 ,
.Xr tanh 3 ,
.Xr math 3
.Sh STANDARDS
The
.Fn cos
function conforms to
.St -ansiC .