Manual browser: cos(3)

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COS(3) Library Functions Manual COS(3)

NAME

cos, cosfcosine 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”).
May 2, 1991 NetBSD 7.0