casinh, casinhf, casinhl — complex arc sine hyperbolic


#include <complex.h>

double complex casinh(double complex z);
float complex casinhf(float complex z);
long double complex casinhl(long double complex z);

Link with -lm.


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))


These functions first appeared in glibc in version 2.1.


For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
casinh(), casinhf(), casinhl() Thread safety MT-Safe

Conforming to

C99, POSIX.1-2001, POSIX.1-2008.

See Also

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


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Referenced By

asinh(3), complex(7), csinh(3).

The man pages casinhf(3) and casinhl(3) are aliases of casinh(3).

2015-04-19 Linux Programmer's Manual