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\" from: @(#)cos.3 5.1 (Berkeley) 5/2/91
\" $NetBSD: cos.3,v 1.17 2019/09/02 00:51:48 sevan Exp $
\"
Dd September 2, 2019
Dt COS 3
Os
Sh NAME
Nm cos ,
Nm cosf ,
Nm cosl
Nd cosine function
Sh LIBRARY
Lb libm
Sh SYNOPSIS
In math.h
Ft double
Fn cos "double x"
Ft float
Fn cosf "float x"
Ft long double
Fn cosl "long double x"
Sh DESCRIPTION
The
Fn cos ,
Fn cosf ,
and
Fn cosl
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
function returns 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 -ansiC .
Sh HISTORY
A
Fn cos
function appeared in
At v1 .
