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asinh(3) Library Functions Manual asinh(3)
asinh, asinhf, asinhl - inverse hyperbolic sine function
Math library (libm, -lm)
#include <math.h> double asinh(double x); float asinhf(float x); long double asinhl(long double x); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): asinh(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 500 || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE asinhf(), asinhl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
These functions calculate the inverse hyperbolic sine of x; that is the value whose hyperbolic sine is x.
On success, these functions return the inverse hyperbolic sine of x. If x is a NaN, a NaN is returned. If x is +0 (-0), +0 (-0) is returned. If x is positive infinity (negative infinity), positive infinity (negative infinity) is returned.
No errors occur.
For an explanation of the terms used in this section, see attributes(7). ┌─────────────────────────────────────┬───────────────┬─────────┐ │ Interface │ Attribute │ Value │ ├─────────────────────────────────────┼───────────────┼─────────┤ │ asinh(), asinhf(), asinhl() │ Thread safety │ MT-Safe │ └─────────────────────────────────────┴───────────────┴─────────┘
C11, POSIX.1-2008.
C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD.
acosh(3), atanh(3), casinh(3), cosh(3), sinh(3), tanh(3)
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Linux man-pages 6.9.1 2024-05-02 asinh(3)
Pages that refer to this page: acosh(3), atanh(3), casinh(3), cosh(3), sinh(3), tanh(3)