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diff --git a/2.3-1/src/c/elementaryFunctions/acsch/zacschs.c b/2.3-1/src/c/elementaryFunctions/acsch/zacschs.c
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+// Copyright (C) 2017 - IIT Bombay - FOSSEE
+//
+// This file must be used under the terms of the CeCILL.
+// This source file is licensed as described in the file COPYING, which
+// you should have received as part of this distribution. The terms
+// are also available at
+// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+// Organization: FOSSEE, IIT Bombay
+// Author: Ashish Kamble
+// Email: toolbox@scilab.in
+#include <math.h>
+#include "acsc.h"
+#include "doubleComplex.h"
+#include "division.h"
+#include "asin.h"
+
+doubleComplex zacscs(doubleComplex x)
+{
+ doubleComplex xinv;
+ xinv = zrdivs(DoubleComplex(1,0),x);
+ return zasins(xinv);
+}