diff options
Diffstat (limited to 'vendor/markbaker/complex/classes/src/functions/tan.php')
-rw-r--r-- | vendor/markbaker/complex/classes/src/functions/tan.php | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/vendor/markbaker/complex/classes/src/functions/tan.php b/vendor/markbaker/complex/classes/src/functions/tan.php new file mode 100644 index 0000000..a6f9610 --- /dev/null +++ b/vendor/markbaker/complex/classes/src/functions/tan.php @@ -0,0 +1,42 @@ +<?php
+
+/**
+ *
+ * Function code for the complex tan() function
+ *
+ * @copyright Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the tangent of a complex number.
+ *
+ * @param Complex|mixed $complex Complex number or a numeric value.
+ * @return Complex The tangent of the complex argument.
+ * @throws Exception If argument isn't a valid real or complex number.
+ * @throws \InvalidArgumentException If function would result in a division by zero
+ */
+if (!function_exists(__NAMESPACE__ . '\\tan')) {
+ function tan($complex): Complex
+ {
+ $complex = Complex::validateComplexArgument($complex);
+
+ if ($complex->isReal()) {
+ return new Complex(\tan($complex->getReal()));
+ }
+
+ $real = $complex->getReal();
+ $imaginary = $complex->getImaginary();
+ $divisor = 1 + \pow(\tan($real), 2) * \pow(\tanh($imaginary), 2);
+ if ($divisor == 0.0) {
+ throw new \InvalidArgumentException('Division by zero');
+ }
+
+ return new Complex(
+ \pow(sech($imaginary)->getReal(), 2) * \tan($real) / $divisor,
+ \pow(sec($real)->getReal(), 2) * \tanh($imaginary) / $divisor,
+ $complex->getSuffix()
+ );
+ }
+}
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