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Message-ID: <7e3d7940-60c8-2df9-2441-7acee57d7ba@esi.com.au>
Date: Fri, 8 Mar 2024 15:20:09 +1100 (AEDT)
From: Damian McGuckin <damianm@....com.au>
To: MUSL <musl@...ts.openwall.com>
Subject: cacosh.c - Comment needs correction
The routine produces the correct answer.
However, currently, the comment at the top says
/* acosh(z) = i acos(z) */
I believe this is technically wrong;
To reflect the code, it should be changed to something like:
/* cacosh(z) = acosh(x +/- i y) = +/- i acos(x + i y) */
Somebody may want to rephrase that, i.e. if the sign of 'y' is positive
then the result is
i * cacos(z)
If the sign is negative, then the result is
-i * cacos(z)
I could always be wrong - Damian
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