Vector Calculator (2D / 3D)

For vectors A and B: A·B = AxBx + AyBy + AzBz; A×B = (AyBz−AzBy, AzBx−AxBz, AxBy−AyBx); |A| = √(A·A); and the angle satisfies cos θ = A·B / (|A||B|). Leave z at 0 for 2D vectors.