casinh(3) Library Functions Manual casinh(3) casinh, casinhf, casinhl - LIBRARY Math library (libm, -lm) #include double complex casinh(double complex z); float complex casinhf(float complex z); long double complex casinhl(long double complex z); 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]. : casinh(z) = clog(z + csqrt(z * z + 1)) attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |casinh(), casinhf(), | | MT-Safe | |casinhl() | | | +----------------------------+----------------------------------------------------------+--------------------------+ C11, POSIX.1-2008. glibc 2.1. C99, POSIX.1-2001. . asinh(3), cabs(3), cimag(3), csinh(3), complex(7) Azamat Hackimov , Dmitriy S. Seregin , Dmitry Bolkhovskikh , Katrin Kutepova , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . casinh(3)