cosh(3) Library Functions Manual cosh(3) cosh, coshf, coshl - LIBRARY Math library (libm, -lm) #include double cosh(double x); float coshf(float x); long double coshl(long double x); glibc (. feature_test_macros(7)): coshf(), coshl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE x, : cosh(x) = (exp(x) + exp(-x)) / 2 x. x NaN, NaN. x +0 -0, -1. x , . , +HUGE_VAL, +HUGE_VALF +HUGE_VALL, . math_error(7), , . : : errno ERANGE. (FE_OVERFLOW). attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |cosh(), coshf(), coshl() | | MT-Safe | +----------------------------+----------------------------------------------------------+--------------------------+ C11, POSIX.1-2008. C99, POSIX.1-2001. , double, SVr4, 4.3BSD. In glibc 2.3.4 and earlier, an overflow floating-point (FE_OVERFLOW) exception is not raised when an overflow occurs. . acosh(3), asinh(3), atanh(3), ccos(3), sinh(3), tanh(3) Azamat Hackimov , Dmitriy S. Seregin , Dmitry Bolkhovskikh , Katrin Kutepova , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . cosh(3)