1 files changed, 36 insertions, 0 deletions
diff --git a/vendor/markbaker/complex/classes/src/functions/acosh.php b/vendor/markbaker/complex/classes/src/functions/acosh.php
new file mode 100644
index 0000000..37e604c
--- /dev/null
+++ b/vendor/markbaker/complex/classes/src/functions/acosh.php
@@ -0,0 +1,36 @@
+<?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;
+    }
+}