1*61285Sbostic.\" Copyright (c) 1991, 1993 2*61285Sbostic.\" The Regents of the University of California. All rights reserved. 348925Scael.\" 448925Scael.\" %sccs.include.redist.man% 548925Scael.\" 6*61285Sbostic.\" @(#)cos.3 8.1 (Berkeley) 06/04/93 748925Scael.\" 848925Scael.Dd 948925Scael.Dt COS 3 1048925Scael.Os 1148925Scael.Sh NAME 1248925Scael.Nm cos 1348925Scael.Nd cosine function 1448925Scael.Sh SYNOPSIS 1548925Scael.Fd #include <math.h> 1648925Scael.Ft double 1748925Scael.Fn cos "double x" 1848925Scael.Sh DESCRIPTION 1948925ScaelThe 2048925Scael.Fn cos 2148925Scaelfunction computes the cosine of 2248925Scael.Fa x 2348925Scael(measured in radians). 2448925ScaelA large magnitude argument may yield a result with little or no 2548925Scaelsignificance. 2648925ScaelFor a discussion of error due to roundoff, see 2748925Scael.Xr math 3 . 2848925Scael.Sh RETURN VALUES 2948925ScaelThe 3048925Scael.Fn cos 3148925Scaelfunction returns the cosine value. 3248925Scael.Sh SEE ALSO 3348925Scael.Xr sin 3 , 3448925Scael.Xr tan 3 , 3548925Scael.Xr asin 3 , 3648925Scael.Xr acos 3 , 3748925Scael.Xr atan 3 , 3848925Scael.Xr atan2 3 , 3948925Scael.Xr sinh 3 , 4048925Scael.Xr cosh 3 , 4148925Scael.Xr tanh 3 , 4248925Scael.Xr math 3 , 4348925Scael.Sh STANDARDS 4448925ScaelThe 4548925Scael.Fn acos 4648925Scaelfunction conforms to 4748925Scael.St -ansiC . 48