EN JA
COS(3)
COS(3) FreeBSD Library Functions Manual COS(3)

NAME

cos, cosf, coslcosine functions

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include < math.h>

double
cos( double x);

float
cosf( float x);

long double
cosl( long double x);

DESCRIPTION

The cos(), cosf(), and cosl() 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(), cosf(), and cosl() functions return the cosine value.

STANDARDS

These functions conform to ISO/IEC 9899:1999 (“ISO C99”).
January 24, 2008 FreeBSD