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gilour
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markbaker
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complex
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acsc.php
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<?php /** * * Function code for the complex acsc() 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 cosecant of a complex number. * * @param Complex|mixed $complex Complex number or a numeric value. * @return Complex The inverse cosecant of the complex argument. * @throws Exception If argument isn't a valid real or complex number. * @throws \InvalidArgumentException If function would result in a division by zero */ function acsc($complex) { $complex = Complex::validateComplexArgument($complex); if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) { return INF; } return asin(inverse($complex)); }