Math Basics

All About Numbers

What is the polar form of a complex number?

The polar form of a complex number is equal to a real number expressed as a angle’s cosine, and the imaginary number (i) times the same angle’s sine, with the angle expressed in radians (for more about angles, sines, cosines, and polar forms, see “Geometry and Trigonometry”). This is seen in equation form as: r(cos θ + i sin θ), in which r is the radius vector, θ is the angle, and i is the imaginary number.


This is a web preview of the "The Handy Math Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App