This is a Mercedes-Benz C63 AMG with a iPE Evolution Valvetronic Exhaust System – with Long Equal Length Header, Cat Pipe, X Pipe and Valvetronic Muffler with Titan Tips. The BMW E92 M3 in the video has a iPE F1 Evolution Valvetronic Exhaust.
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Jane taught math 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 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
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 now fashionable “sohcahtoa” approach to trigonometry, which obscures the fundamental ideas.
YouTube rep advised me me to add a paragraph to each upload. Here it is:
Jane, a retired university math teacher, started this volunteer project in April 2009. Positive feedback from wonderful viewers worldwide keeps her motivated. Jane is a strong advocate of reading music. She made unconventional sight-reading lessons that simplifies reading music.