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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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