asind(3M)

NAME

asind(), asindf() − degree-valued arcsine functions

SYNOPSIS

#include <math.h>

double asind(double x);

float asindf(float x);

DESCRIPTION

asind() is a degree-valued version of the asin() function. It returns the arcsine of x in the range −90 to 90.

asindf() is a float version of asind(); 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.

asind() and asindf() are not specified by any standard, but asindf() 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, asind() returns NaN.

If the magnitude of x is greater than one, asind() returns zero and sets errno to [EDOM].

ERRORS

If asind() fails, errno is set to the following value.

[EDOM] The magnitude of x is greater than one.

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