casinh(3)

1casinh(3)                  Library Functions Manual                  casinh(3)
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NAME

6       casinh, casinhf, casinhl - complex arc sine hyperbolic
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LIBRARY

9       Math library (libm, -lm)
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SYNOPSIS

12       #include <complex.h>
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14       double complex casinh(double complex z);
15       float complex casinhf(float complex z);
16       long double complex casinhl(long double complex z);
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DESCRIPTION

19       These  functions  calculate  the  complex arc hyperbolic sine of z.  If
20       y = casinh(z), then z = csinh(y).  The imaginary part of y is chosen in
21       the interval [-pi/2,pi/2].
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23       One has:
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25           casinh(z) = clog(z + csqrt(z * z + 1))
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ATTRIBUTES

28       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
29       tributes(7).
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31       ┌────────────────────────────────────────────┬───────────────┬─────────┐
32       │Interface                                   │ Attribute     │ Value   │
33       ├────────────────────────────────────────────┼───────────────┼─────────┤
34       │casinh(), casinhf(), casinhl()              │ Thread safety │ MT-Safe │
35       └────────────────────────────────────────────┴───────────────┴─────────┘
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STANDARDS

38       C11, POSIX.1-2008.
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HISTORY

41       glibc 2.1.  C99, POSIX.1-2001.
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