/**
* @param ComplexType $a first operand
* @param ComplexType $exp second operand
*
* @return array [real, imaginary]
*/
protected function getPowExponentPartsFromPolar(ComplexType $a, ComplexType $exp)
{
$eReal = $exp->r()->get();
$eImaginary = $exp->i()->get();
$logr = log($a->modulus()->get());
$theta = $a->theta()->get();
$rho = exp($logr * $eReal - $eImaginary * $theta);
$beta = $theta * $eReal + $eImaginary * $logr;
return [$rho * cos($beta), $rho * sin($beta)];
}
/**
* @dataProvider polars
*/
public function testThetaReturnsCorrectValue(ComplexType $c, $r, $t)
{
$this->assertEquals($t, (string) $c->theta());
}