COS(3)                    386BSD Programmer's Manual                    COS(3)

NAME
     cos - cosine function

SYNOPSIS
     #include <math.h>

     double
     cos(double x)

DESCRIPTION
     The cos() function computes the cosine of 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 math(3).

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

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

STANDARDS
     The acos() function conforms to ANSI C3.159-1989 (``ANSI C'').

BSD Experimental                  May 2, 1991                                1