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HP-UX 11i Version 3: February 2007

Technical documentation

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sind(), sindf(), sindl(), sindw(), sindq() — sine functions of argument specified in degrees


#include <math.h>

double sind(double x);

float sindf(float x);

HP Integrity Server Only

long double sindl(long double x);

extended sindw(extended x);

quad sindq(quad x);


sind() returns the sine of x (x specified in degrees).

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

sindf() is a float version of sind(); it takes a float argument and returns a float result.

Integrity Server Only

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

sindw() is an extended version of sind(); it takes an extended argument and returns an extended result.

sindq() is equivalent to sindl() on HP-UX systems.


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) sindw() or sindq(), 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.


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

If x is NaN, sind() returns NaN. If x is NaN or INFINITY, sind() returns NaN.


No errors are defined.


These functions are not specified by any standard.

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