1CASIN(3)                     complex math routines                    CASIN(3)
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NAME

6       casin, casinf, casinl - complex arc sine
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SYNOPSIS

9       #include <complex.h>
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11       double complex casin(double complex z);
12       float complex casinf(float complex z);
13       long double complex casinl(long double complex z);
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15       Link with -lm.
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DESCRIPTION

18       The  casin()  function calculates the complex asin().  If y = casin(z),
19       then z = csin(y).  The real  part  of  y  is  chosen  in  the  interval
20       [-pi/2,pi/2].
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22       One has casin(z) = -i clog(iz+csqrt(1-z*z)).
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CONFORMING TO

25       C99
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SEE ALSO

28       ccos(3), clog(3), complex(7)
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32                                  2002-07-28                          CASIN(3)