xref: /freebsd/lib/msun/man/cos.3 (revision 32eef9aeb1f39a1623cea55da147c89abbd5b9a5)

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.\"     from: @(#)cos.3	5.1 (Berkeley) 5/2/91
.\" $FreeBSD$
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.Dd May 2, 1991
.Dt COS 3
.Os
.Sh NAME
.Nm cos ,
.Nm cosf
.Nd cosine functions
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn cos "double x"
.Ft float
.Fn cosf "float x"
.Sh DESCRIPTION
The
.Fn cos
and the
.Fn cosf
functions compute 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
and the
.Fn cosf
functions return the cosine value.
.Sh SEE ALSO
.Xr acos 3 ,
.Xr asin 3 ,
.Xr atan 3 ,
.Xr atan2 3 ,
.Xr cosh 3 ,
.Xr math 3 ,
.Xr sin 3 ,
.Xr sinh 3 ,
.Xr tan 3 ,
.Xr tanh 3
.Sh STANDARDS
The
.Fn cos
function conforms to
.St -isoC .