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cos(3) [netbsd man page]

COS(3)							   BSD Library Functions Manual 						    COS(3)

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. SEE ALSO
acos(3), asin(3), atan(3), atan2(3), cosh(3), math(3), sin(3), sinh(3), tan(3), tanh(3) STANDARDS
The cos() function conforms to ANSI X3.159-1989 (``ANSI C89''). BSD
May 2, 1991 BSD
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