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 attributes(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) Linux man-pages 6.03 2022-12-15 casinh(3)