NAME

sind(), sindf() − degree-valued sine functions

SYNOPSIS

#include <math.h>

double sind(double x);

float sindf(float x);

DESCRIPTION

sind() is a degree-valued version of the sin() function.  It returns the sine of x (x specified in degrees). 

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.  To use this function, compile either with the −Ae option or with the −Aa and −D_HPUX_SOURCE options.  Otherwise, the compiler promotes the float argument to double, and the function returns incorrect results. 

sind() and sindf() are not specified by any standard, but sindf() is named in accordance with the conventions specified in the "Future Library Directions" section of the ANSI C standard. 

To use these functions, link in the math library by specifying −lm on the compiler or linker command line. 

RETURN VALUE

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

If the correct value after rounding would be smaller in magnitude than MINDOUBLE, sind() returns zero. 

ERRORS

No errors are defined. 

SEE ALSO

sin(3M), cosd(3M), tand(3M), asind(3M), acosd(3M), atand(3M), atan2d(3M), isinf(3M), isnan(3M), values(5). 

Hewlett-Packard Company  —  HP-UX Release 10.20:  July 1996