⇒ The modulus or absolute value of a complex number is the magnitude of its corresponding vector

⇒ The argument of a complex number is the angle its corresponding vector makes with the positive real axis

⇒ If z does not lie in the first quadrant, you can use the Argand diagram to help you find its argument

⇒ Also see our notes on:

• Argand Diagrams
• Modulus-Argument form of Complex Numbers
• Loci in the Argand Diagram
• Regions in the Argand Diagram