Jump to content United States-English
HP.com Home Products and Services Support and Drivers Solutions How to Buy
» Contact HP
More options
HP.com home
HP-UX Reference > C

cosd(3M)

HP-UX 11i Version 3: February 2007
» 

Technical documentation

» Feedback
Content starts here

 » Table of Contents

 » Index

NAME

cosd(), cosdf(), cosdl(), cosdw(), cosdq() — cosine functions of an argument specified in degrees

SYNOPSIS

#include <math.h>

double cosd(double x);

float cosdf(float x);

HP Integrity Server Only

long double cosdl(long double x);

extended cosdw(extended x);

quad cosdq(quad x);

DESCRIPTION

cosd() returns the cosine of x (x specified in degrees).

On PA-RISC systems, cosd() may lose accuracy when x is far from zero.

cosdf() is a float version of cosd(); it takes a float argument and returns a float result.

Integrity Server Only

cosdl() is a long double version of cosd(); it takes a long double argument and returns a long double result.

cosdw() is an extended version of cosd(); it takes an extended argument and returns an extended result.

cosdq() is equivalent to cosdl() on HP-UX systems.

USAGE

To use these functions compile either with the default -Ae option or with the -Aa and -D_HPUX_SOURCE options.

To use (for Integrity servers) cosdw() or cosdq(), compile also with the -fpwidetypes option.

To use any of these functions, make sure your program includes <math.h>, and link in the math library by specifying -lm on the compiler or linker command line.

For more information, see the HP-UX floating-point guide for HP Integrity servers at the following site: http://www.hp.com/go/fp.

RETURN VALUE

cosd(±0) returns 1.

If x is ±INFINITY, cosd() returns NaN and raises the invalid exception.

If x is NaN, cosd() returns NaN.

ERRORS

No errors are defined.

STANDARDS CONFORMANCE

These functions are not specified by any standard.

Printable version
Privacy statement Using this site means you accept its terms Feedback to webmaster
© 1983-2007 Hewlett-Packard Development Company, L.P.