COS(3)                      BSD 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 signifi-
     cance.  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'').

BSDI BSD/386                    March 26, 1993                               1