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Math Notes and Math Tests
Pre Calculus Notes: Complex Numbers [Pdf]
The resource discusses complex numbers. Topics examined are the complex plane, complex conjugates, dividing complex numbers, and complex zeros of functions.
Wolfram Research
Wolfram Math World: Real Part
This MathWorld site contains a graphical example of the real part of a complex number.
University of Toronto (Canada)
How Can One Show That Imaginary Numbers Really Do Exist?
Contains a brief summary about the theory of imaginary numbers.
Windstream
Ojk's Precalculus Study Page: Geometric Representation of Complex Numbers
An introduction to viewing the complex plane in terms of polar coordinates. Assumes knowledge of the conversion formulas. Includes several examples and pictures.
Windstream
Ojk's Precalculus Study Page: Powers of Complex Numbers
An introduction to DeMoivre's Theorem for quickly finding the powers of complex numbers. Assumes knowledge of polar form of complex numbers. Includes several examples and pictures.
University of California
Ucla: Complex Plane
This site from UCLA provides great information on the complex plane. The main feature of the site is an applet that illustrates the complex plane. It is a great learning tool in dealing with the features of the complex plane.
Wolfram Research
Wolfram Math World: Real Axis
This MathWorld site contains a definition and graphical example of the real axis in a complex plane.
Wolfram Research
Wolfram Math World: Imaginary Axis
Contains a graphical example of the imaginary axis in a complex plane.
Math Words
Math words.com: Complex Numbers
At MathWords.com, a definition is given for what complex numbers are, along with some examples.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Numeros Complejos
Practice how to represent complex numbers graphically, operations with complex numbers and geometric transformations.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Complejos
In this unit you can practice interactively the concept of complex numbers in binomial and polar forms.
Free Math Help
Free Math Help: Imaginary Numbers
The lesson investigates imaginary numbers. An explanation and sample exercises are provided.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Complex Numbers
Find a quick, concise explanation of Complex Numbers.
That Quiz
That Quiz: Puntos
This is an interactive practice test to review graphing points on the Cartesian, Polar and Complex plane. Test are timed and keep track of right and wrong answers.
Windstream
Ojk's Precalculus Study Page: Polar Coordinates and Complex Numbers
An introduction to basic conversion formulas for polar coordinates and complex numbers. Includes several examples.
University of Toronto (Canada)
The Origin of Complex Numbers and the Notation "I"
Contains a brief summary on the origin of complex numbers.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Real Number System
Find a quick, concise explanation of real numbers. Examples are given and clearly explained in a diagram that shows the relationship real numbers has to other numbers.
National Council of Teachers of Mathematics
The Math Forum: Drexel University Math Forum: Imaginary Numbers
Contains a short summary on imaginary numbers and several links to its related fields. Also provides several examples and explanations for understanding.
Other
Gobierno De Navarra: Numeros Complejos
Use these interactive activities as a supplementary material to practice sum, difference, multiplication and division, power and roots of complex numbers.
Friesian School
Friesian.com: Imaginary Numbers
This site from Friesian.com contains a detailed definition of imaginary numbers along with a few examples.
Math Open Reference
Math Open Reference: Imaginary Number
Learn about imaginary numbers with this handy reference guide. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.
Math Words
Math words.com: Complex Plane
Contains the definition and a picture for what a complex plane is.