Khan Academy Video Course: Trigonometry
32 Installments—Entirely free
Trigonometry focuses on the mathematics of triangles—their sides and the angles between them. Although it sounds like a humble topic of study, its purpose when it was developed in the 3rd century BC was very noble: early astronomers used the principles and functions of trigonometry to study the heavens. This course covers basic laws and trigonometric functions. A good understanding of geometry will help prepare you for trigonometry, and after you've mastered trig you can move on to the next course in the traditional sequence, pre-calculus.
Note that given the length of these lessons, you may want to adjust your settings to receive one or two lessons a week.
Extended Copyright Information
Copyright 2011 by Khan Academy.
This Khan Academy Course is made available under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike-3.0 license.
Back to top
The Khan Academy is a not-for-profit 501(c)(3) with the mission of providing a world-class education to anyone, anywhere.Back to top
Opening Lines (Experimental)
Today’s Trigonometry lesson (in video) from the Khan Academy is:
To view other Khan Academy videos, you can find them at their website here:
P.S. Note that given the length of these lessons, you may want to adjust your settings to receive one or two lessons a ...
Copyright 2011 by Khan Academy.Back to top