COS(3) BSD Library Functions 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 ALSOsin(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 X3.159-1989 (“ANSI C89”).
BSD June 4, 1993 BSD