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ACOSH (3) | C library functions | Unix Manual Pages | :man

NAME

acosh, acoshf - 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"

DESCRIPTION

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

RETURN VALUES

The acosh and the acoshf 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


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