NAME
casinh, casinhf, casinhl - complex arc sine hyperbolic
SYNOPSIS
#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.
DESCRIPTION
The casinh() function calculates 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 first appeared in glibc in version 2.1.
CONFORMING TO
C99.
SEE ALSO
asinh(3), cabs(3), cimag(3), complex(7)
COLOPHON
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