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complex: fix comment in cacosh

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The principal expressions defining acosh and acos are such that

  acosh(z) = ±i acos(z)

where the + is only true on the Im(z)>0 half of the complex plane
(and partly on Im(z)==0 depending on number representation).

fix the comment without expanding on the details.
This commit is contained in:
Szabolcs Nagy 2024-03-10 21:00:40 +01:00 • committed by Rich Felker
parent 9683bd6241
commit e3b0ace505
1 changed files with 1 additions and 1 deletions
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2
src/complex/cacosh.c
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@ -1,6 +1,6 @@
#include "complex_impl.h"
/* acosh(z) = i acos(z) */
/* acosh(z) = ±i acos(z) */
double complex cacosh(double complex z)
{