Pre-Calculus: Complex Numbers - Trig or Polar Form
http://www.mindbites.com/series/287-trigonometry-graphing-other-trig-functions for a bundle of videos on . For an even broader bundle of videos that cover and , check out http://www.mindbites.com/series/281-trigonometry-trigonometric-functions . To search for topic-specific help in our library of 400+ video products for Trigonometry & Pre-Calculus, please refer to our Trigonometry category at: http://www.mindbites.com/category/31-trigonometry and our Calculus Category at http://www.mindbites.com/category/23-calculus . To check out our full Trig & Pre-Cal video course, with 150 videos included, refer to: http://www.mindbites.com/series/845-trigonometry-full-course . Or, for access to this single video, go to: http://www.mindbites.com/lesson/1222-pre-calculus-complex-numbers-trig-or-polar-form This lesson instructs you on how to convert complex numbers into trig form (also known as polar form). Complex numbers, written in the form (a + bi), are an extension of the real numbers obtained by adjoining an imaginary unit, denoted by i, which is the square root of negative 1. To convert complex numbers into trigonometric or polar form, Professor Burger first walks you through sketching a graph of the number and drawing a right triangle. From that, he shows you how to use the trig properties to find the unknown values and the modulus. Then, you plug these falues into the trig form and determine the angle. To illustrate this method, Professor Burger walks you through an example in which he converts (-(3^1/2), +i) to polar or trigonometric form. Taught by Professor Edward Burger, this lesson was selected from a broader, comprehensive course, Precalculus.
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