DataMuseum.dk

Presents historical artifacts from the history of:

Commodore CBM-900

This is an automatic "excavation" of a thematic subset of
artifacts from Datamuseum.dk's BitArchive.

See our Wiki for more about Commodore CBM-900

Excavated with: AutoArchaeologist - Free & Open Source Software.

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⟦703e3329d⟧ TextFile

    Length: 255 (0xff)
    Types: TextFile
    Notes: UNIX file
    Names: »asin.c«

Derivation

└─⟦f27320a65⟧ Bits:30001972 Commodore 900 hard disk image with partial source code
    └─⟦f4b8d8c84⟧ UNIX Filesystem
        └─ ⟦this⟧ »libm/asin.c«

TextFile

/*
 * Compute the inverse sine function.
 */
#include <math.h>

double
asin(x)
double x;
{
	if (x<-1.0 || x>1.0) {
		errno = EDOM;
		return (0.0);
	}
	if (x == 1.0)
		return (PI/2.0);
	if (x == -1.0)
		return (-PI/2.0);
	return (atan(x/sqrt(1.0-x*x)));
}