HP-UX Reference (11i v1 05/09) - 3 Library Functions N-Z (vol 7)

sind(3M) sind(3M)

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.

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, compile either with the default

-Ae option or with the -Aa

and

-D_HPUX_SOURCE options. Make sure your program includes <

math.h>. Llink 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.