casinh(3) Library Functions Manual casinh(3)
NAME
casinh, casinhf, casinhl - complex arc sine hyperbolic
LIBRARY
Math library (libm, -lm)
SYNOPSIS
#include <complex.h>
double complex casinh(double complex z);
float complex casinhf(float complex z);
long double complex casinhl(long double complex z);
DESCRIPTION
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))
VERSIONS
These functions were added in glibc 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see at-
tributes(7).
┌────────────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├────────────────────────────────────────────┼───────────────┼─────────┤
│casinh(), casinhf(), casinhl() │ Thread safety │ MT-Safe │
└────────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
C99, POSIX.1-2001, POSIX.1-2008.
SEE ALSO
asinh(3), cabs(3), cimag(3), csinh(3), complex(7)
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