casin, casinf, casinl - complex arc sine

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ casin(), casinf(), casinl()                                                 │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       These  functions  calculate the complex arc sine of z.  If y=casin(z), then z=csin(y).  The real part
       of y is chosen in the interval [-pi/2,pi/2].

       One has:

           casin(z) = -i clog(iz + csqrt(1 - z * z))

       glibc 2.1.  C99, POSIX.1-2001.

       Math library (libm, -lm)

       casin, casinf, casinl - complex arc sine

clog(3), csin(3), complex(7)

Linux man-pages 6.9.1                              2024-05-02                                           casin(3)

       C11, POSIX.1-2008.

#include<complex.h>doublecomplexcasin(doublecomplexz);floatcomplexcasinf(floatcomplexz);longdoublecomplexcasinl(longdoublecomplexz);