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diff --git a/src/c/elementaryFunctions/includes/acoth.h b/src/c/elementaryFunctions/includes/acoth.h
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+++ b/src/c/elementaryFunctions/includes/acoth.h
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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
+
+#ifndef __ACOTH_H__
+#define __ACOTH_H__
+#include "types.h"
+#include "floatComplex.h"
+#include "doubleComplex.h"
+
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+double dacoths(double x);
+
+void dacotha(double* x, int size, double* y); 
+
+float sacoths(float x);
+
+void sacotha(float* x, int size, float* y); 
+
+floatComplex cacoths(floatComplex x);
+
+void cacotha(floatComplex* x, int size, floatComplex* y); 
+
+doubleComplex zacoths(doubleComplex x);
+
+void zacotha(doubleComplex* x, int size, doubleComplex* y); 
+
+#ifdef  __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* !__ACOTH_H__ */
+