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Command: cos | Section: 3 | Source: OpenBSD | File: cos.3
COS(3) FreeBSD Library Functions Manual COS(3)
NAME
cos, cosf, cosl - cosine functions
SYNOPSIS
#include <math.h>
double
cos(double x);
float
cosf(float x);
long double
cosl(long double x);
DESCRIPTION
The cos() function computes the cosine of x (measured in radians). The
cosf() function is a single precision version of cos(). The cosl()
function is an extended precision version of cos(). A large magnitude
argument may yield a result with little or no significance.
RETURN VALUES
The cos(), cosf() and cosl() functions return the cosine value.
SEE ALSO
acos(3), asin(3), atan(3), atan2(3), cosh(3), sin(3), sinh(3), tan(3),
tanh(3)
STANDARDS
The cos() function conforms to ANSI X3.159-1989 ("ANSI C89").
HISTORY
A cos() function first appeared in Version 1 AT&T UNIX.
FreeBSD 14.1-RELEASE-p8 September 6, 2019 FreeBSD 14.1-RELEASE-p8