From bd0f7fd3df899c562a8ec0495932ba1b01c65999 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Thu, 5 Dec 2002 15:30:52 +0000
Subject: [PATCH] (solar-atn2): Give correct quadrant for arctan.

---
 lisp/calendar/solar.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/calendar/solar.el b/lisp/calendar/solar.el
index 889129858d9..10c385ac4a2 100644
--- a/lisp/calendar/solar.el
+++ b/lisp/calendar/solar.el
@@ -262,7 +262,7 @@ Returns nil if nothing was entered."
    "Arctan of point X, Y."
    (if (= x 0)
        (if (> y 0) 90 270)
-     (solar-arctan (/ y x) x)))
+     (solar-arctan (/ y x) (solar-xy-to-quadrant x y))))
 
 (defun solar-arccos (x)
      "Arcos of X."
-- 
2.39.2