1CASIN(3)                   Linux Programmer's Manual                  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  arc  sine  of  z.  If
19       y = casin(z), then z = csin(y).  The real part of y is  chosen  in  the
20       interval [-pi/2,pi/2].
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22       One has:
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24           casin(z) = -i clog(iz + csqrt(1 - z * z))
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VERSIONS

27       These functions first appeared in glibc in version 2.1.
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CONFORMING TO

30       C99.
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SEE ALSO

33       ccos(3), clog(3), complex(7)
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COLOPHON

36       This  page  is  part of release 3.25 of the Linux man-pages project.  A
37       description of the project, and information about reporting  bugs,  can
38       be found at http://www.kernel.org/doc/man-pages/.
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42                                  2008-08-11                          CASIN(3)
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