public function testCrossProductDistributivity(array $A, array $B, array $C)
{
$A = new Vector($A);
$B = new Vector($B);
$C = new Vector($C);
$Ax⟮B+C⟯ = $A->crossProduct($B->add($C));
$⟮AxB⟯+⟮AxC⟯ = $A->crossProduct($B)->add($A->crossProduct($C));
$this->assertEquals($Ax⟮B+C⟯, $⟮AxB⟯+⟮AxC⟯);
$this->assertEquals($Ax⟮B+C⟯->getVector(), $⟮AxB⟯+⟮AxC⟯->getVector());
}