Jane taught calculus at U. Mass Lowell. For those of you in high school, this is far more important than my piano tutorials! Added English subtitles so you can use the translation option.

This is the most basic lesson on trigonometry. Definitions of the 6 trig functions are given with examples, ending with an extremely useful table for calculus students (11:08).

For those thumb-downers who thought I made a mistake because you do not know that 1/sqrt2 = sqrt2 /2, I finally made a separate lesson for you!

Much Ado About Square Root Two: http://youtu.be/DuUGg0nkWy0

https://sites.google.com/site/pianoandmathtutorials/math-tutorials

Background Music: Two Bach/Petzold Minuets

The study of trigonometry (as well as any mathematical subject) should be based on a solid understanding of the basic ideas, and memorization should be kept to a minimum. For that reason we oppose using the silly "sohcahtoa" approach to trigonometry, which obscures the fundamental ideas.

https://sites.google.com/site/pianoandmathtutorials/