casinh, casinhf, casinhl - complex arc sine hyperbolic

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

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

       One has:

           casinh(z) = clog(z + csqrt(z * z + 1))

       glibc 2.1.  C99, POSIX.1-2001.

       Math library (libm, -lm)

       casinh, casinhf, casinhl - complex arc sine hyperbolic

asinh(3), cabs(3), cimag(3), csinh(3), complex(7)

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

       C11, POSIX.1-2008.

#include<complex.h>doublecomplexcasinh(doublecomplexz);floatcomplexcasinhf(floatcomplexz);longdoublecomplexcasinhl(longdoublecomplexz);