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Man Pages


Manual Reference Pages  -  ACOSHF (3)

NAME

acosh, acoshf, acoshl - inverse hyperbolic cosine functions

CONTENTS

Library
Synopsis
Description
Return Values
See Also
History

LIBRARY


.Lb libm

SYNOPSIS


.In math.h double acosh double x float acoshf float x long double acoshl long double x

DESCRIPTION

The acosh, acoshf, and acoshl functions compute the inverse hyperbolic cosine of the real argument x. For a discussion of error due to roundoff, see math(3).

RETURN VALUES

These functions return the inverse hyperbolic cosine of x. If the argument is less than 1, acosh raises an invalid exception and returns an NaN.

SEE ALSO

asinh(3), atanh(3), exp(3), fenv(3), math(3)

HISTORY

The acosh, acoshf, and acoshl functions appeared in BSD 4.3 ,
.Fx 2.0 , and
.Fx 10.0 , respectively.
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