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Annotation of coherent/b/lib/libm/asin.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Compute the inverse sine function.
                      3:  */
                      4: #include <math.h>
                      5: 
                      6: #if    EMU87
                      7: #include "emumath.h"
                      8: #endif
                      9: 
                     10: double
                     11: asin(x)
                     12: double x;
                     13: {
                     14:        if (x<-1.0 || x>1.0) {
                     15:                errno = EDOM;
                     16:                return (0.0);
                     17:        }
                     18:        if (x == 1.0)
                     19:                return (PI/2.0);
                     20:        if (x == -1.0)
                     21:                return (-PI/2.0);
                     22:        return (atan(x/sqrt(1.0-x*x)));
                     23: }

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