asinh - Online Linux Manual PageSection : 3
Updated : 2023-02-05
Source : Linux man-pages 6.03

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NAMEasinh, asinhf, asinhl − inverse hyperbolic sine function

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LIBRARYMath library (libm, −lm)

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SYNOPSIS#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_SOURCEasinhf(), asinhl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

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DESCRIPTIONThese functions calculate the inverse hyperbolic sine of x; that is the value whose hyperbolic sine is x.

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RETURN VALUEOn 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.

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ERRORSNo errors occur.

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ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue asinh(), asinhf(), asinhl() Thread safetyMT-Safe

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STANDARDSC99, POSIX.1-2001, POSIX.1-2008. The variant returning double also conforms to SVr4, 4.3BSD.

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SEE ALSOacosh(3), atanh(3), casinh(3), cosh(3), sinh(3), tanh(3) 0

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