COS(3) |
Library Functions Manual |
COS(3) |
NAME
cos, cosf — cosine function
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
cos(double x);
float
cosf(float x);
DESCRIPTION
The
cos() and
cosf() functions compute 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.
STANDARDS
The cos() function conforms to ANSI X3.159-1989 (“ANSI C89”).