1 files changed, 31 insertions, 0 deletions
diff --git a/vendor/markbaker/complex/classes/src/functions/sqrt.php b/vendor/markbaker/complex/classes/src/functions/sqrt.php
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+++ b/vendor/markbaker/complex/classes/src/functions/sqrt.php
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+<?php
+
+/**
+ *
+ * Function code for the complex sqrt() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the square root of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The Square root of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+if (!function_exists(__NAMESPACE__ . '\\sqrt')) {
+    function sqrt($complex): Complex
+    {
+        $complex = Complex::validateComplexArgument($complex);
+
+        $theta = theta($complex);
+        $delta1 = \cos($theta / 2);
+        $delta2 = \sin($theta / 2);
+        $rho = \sqrt(rho($complex));
+
+        return new Complex($delta1 * $rho, $delta2 * $rho, $complex->getSuffix());
+    }
+}