The term 'cis θ' is shorthand for the expression 'cos(θ) + i sin(θ)', which represents a complex number in polar form. This notation connects the angular coordinate, θ, with the Cartesian coordinates of a complex number, making it easier to manipulate and visualize complex numbers in the complex plane. It bridges the gap between rectangular and polar representations, allowing for simpler calculations involving multiplication and division of complex numbers.
congrats on reading the definition of cis θ. now let's actually learn it.