COS(3)                    OpenBSD Programmer's Manual                   COS(3)

NAME
     cos, cosf - cosine functions



SYNOPSIS
     #include <math.h>

     double
     cos(double x);

     float
     cosf(float x);

DESCRIPTION
     The cos() and cosf() functions compute the cosine of x (measured in radi-
     ans).  A large magnitude argument may yield a result with little or no
     significance.  For a discussion of error due to roundoff, see math(3).

RETURN VALUES
     The cos() function returns the cosine value.

SEE ALSO
     acos(3),  asin(3),  atan(3),  atan2(3),  cosh(3),  math(3),  sin(3),
     sinh(3),  tan(3),  tanh(3)

STANDARDS
     The cos() function conforms to ANSI X3.159-1989 (``ANSI C'').

OpenBSD 2.6                       May 2, 1991                                1