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<?php /** * * Function code for the complex pow() function * * @copyright Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex) * @license https://opensource.org/licenses/MIT MIT */ namespace Complex; /** * Returns a complex number raised to a power. * * @param Complex|mixed $complex Complex number or a numeric value. * @param float|integer $power The power to raise this value to * @return Complex The complex argument raised to the real power. * @throws Exception If the power argument isn't a valid real */ if (!function_exists(__NAMESPACE__ . '\\pow')) { function pow($complex, $power): Complex { $complex = Complex::validateComplexArgument($complex); if (!is_numeric($power)) { throw new Exception('Power argument must be a real number'); } if ($complex->getImaginary() == 0.0 && $complex->getReal() >= 0.0) { return new Complex(\pow($complex->getReal(), $power)); } $rValue = \sqrt(($complex->getReal() * $complex->getReal()) + ($complex->getImaginary() * $complex->getImaginary())); $rPower = \pow($rValue, $power); $theta = $complex->argument() * $power; if ($theta == 0) { return new Complex(1); } return new Complex($rPower * \cos($theta), $rPower * \sin($theta), $complex->getSuffix()); } }