COS (3)
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
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