Complex Numbers & Trig
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Alan Selby  
Complex Numbers and the Distributive Law for Complex Numbers, offering a short way to reach and explain trigonometry, the Pythagorean theorem, trig formulas for dot and crossproducts, the cosine law, and a converse to the Pythagorean theorem. A geometric story describes the complex numbers, or what mathematicians since Gauss in the 1840's have regarded as the complex numbers, providing a confirmation of the law of signs for real numbers. With an applet that illustrates operations with complex numbers.  


Levels:  High School (912), College 
Languages:  English 
Resource Types:  Books, Web Interactive/Java 
Math Topics:  Basic Algebra, Imaginary/Complex Numbers, Coordinate Plane Geometry, Trigonometry 
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