updated-packages

vendor/markbaker/complex/classes/src/functions/acsch.php

@@ -0,0 +1,31 @@
+<?php
+
+/**
+ *
+ * Function code for the complex acsch() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse hyperbolic cosecant of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse hyperbolic cosecant of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+if (!function_exists(__NAMESPACE__ . '\\acsch')) {
+    function acsch($complex): Complex
+    {
+        $complex = Complex::validateComplexArgument($complex);
+
+        if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) {
+            return new Complex(INF);
+        }
+
+        return asinh(inverse($complex));
+    }
+}