opendarwin man page for cos

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

NAME
     cos -- cosine function

SYNOPSIS
     #include <math.h>

     double
     cos(double x);

DESCRIPTION
     The cos() function computes the cosine of x (measured in radians).

SPECIAL VALUES
     cos(+-0) returns 1.

     cos(+-infinity) returns a NaN and raises the "invalid" floating-point exception.

SEE ALSO
     sin(3), tan(3), asin(3), acos(3), atan(3), atan2(3), sinh(3), cosh(3), tanh(3), math(3)

STANDARDS
     The cos() function conforms to ISO/IEC 9899:1999(E).

BSD
								 November 20, 2002							       BSD