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-rw-r--r--vendor/markbaker/complex/classes/src/functions/acosh.php36
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diff --git a/vendor/markbaker/complex/classes/src/functions/acosh.php b/vendor/markbaker/complex/classes/src/functions/acosh.php
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+<?php
+
+/**
+ *
+ * Function code for the complex acosh() 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 cosine of a complex number.
+ *
+ * @param Complex|mixed $complex Complex number or a numeric value.
+ * @return Complex The inverse hyperbolic cosine of the complex argument.
+ * @throws Exception If argument isn't a valid real or complex number.
+ */
+if (!function_exists(__NAMESPACE__ . '\\acosh')) {
+ function acosh($complex)
+ {
+ $complex = Complex::validateComplexArgument($complex);
+
+ if ($complex->isReal() && ($complex->getReal() > 1)) {
+ return new Complex(\acosh($complex->getReal()));
+ }
+
+ $acosh = acos($complex)
+ ->reverse();
+ if ($acosh->getReal() < 0.0) {
+ $acosh = $acosh->invertReal();
+ }
+
+ return $acosh;
+ }
+}