Real numbers on the horizontal axis, imaginary on the vertical. Every complex number is a point — or an arrow from the origin.
Multiplying by i rotates a point 90° counterclockwise. Multiplying by i twice (= −1) rotates 180°.
Real numbers on the horizontal axis, imaginary on the vertical. Every complex number is a point — or an arrow from the origin.
Multiplying by i rotates a point 90° counterclockwise. Multiplying by i twice (= −1) rotates 180°.