COS(3)

NAME
       cos - cosine function

SYNOPSIS
       #include <<math.h>>

       double cos(double x);

DESCRIPTION
       The  cos()  function  returns  the cosine of x, where x is
       given in radians.

RETURN VALUE
       The cos() function returns a value between -1 and 1.

CONFORMING TO
       SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO
       acos(3) asin(3) atan(3) atan2(3) sin(3) tan(3)