High School · The Complex Number System

CCSS.MATH.CONTENT.HSN.CN.B.5

(+) Represent addition, subtraction, multiplication, and conjugation of complex numbers geometrically on the complex plane; use properties of this representation for computation.

Read this standard on the official Common Core site

Lessons that teach this standard

• De Moivre's Theorem and Roots of Complex Numbers

  Raise a complex number to a power by raising its length and multiplying its angle, then reverse the rule to find all n of its nth roots, evenly spaced on a circle.

• The Complex Plane: Polar Form and Geometric Operations

  How to plot complex numbers, why rectangular and polar form name the same point, why multiplying multiplies lengths and adds angles, and how to find distances.