ccosh(3) Library Functions Manual ccosh(3) ccosh, ccoshf, ccoshl - (libm -lm) #include double complex ccosh(double complex z); float complex ccoshf(float complex z); long double complex ccoshl(long double complex z); z. : ccosh(z) = (exp(z)+exp(-z))/2 C11, POSIX.1-2008. glibc 2.1. C99 POSIX.1-2001. cabs(3), cacosh(3), csinh(3), ctanh(3), complex(7) 3 . . : . 6.18 8 2026 ccosh(3)