casinh(3) Library Functions Manual casinh(3) casinh, casinhf, casinhl - (libm -lm) #include double complex casinh(double complex z); float complex casinhf(float complex z); long double complex casinhl(long double complex z); z. y = casinh(z) z = csinh(y). y [-pi/2,pi/2]. : casinh(z) = clog(z + csqrt(z * z + 1)) attributes(7). +------------+------------------------------------+--------------------+ || | | +------------+------------------------------------+--------------------+ |casinh(), | | MT-Safe | |casinhf(), | | | |casinhl() | | | +------------+------------------------------------+--------------------+ C11, POSIX.1-2008. glibc 2.1. C99 POSIX.1-2001. asinh(3), cabs(3), cimag(3), csinh(3), complex(7) 3 . . : . 6.18 8 2026 casinh(3)