This mini lecture appears in the textbook, Trigonometry, published by XYZ Textbooks. The video appears in the eBook and is also accessible through one of the QR codes in Chapter 5 of the printed book. Access to all the eBooks at XYZ Textbooks is $45 per year. The print book sells for $50 and includes access to all the eBooks for a year. There are over 700 instructional videos embedded into the eBook, and more are added each year.
Promo Code: YouTube5
This code will give you a $5.00 discount on the print version of Trigonometry, published by XYZ Textbooks. Here is the link to purchase the book:
https://www.xyztextbooks.com/catalog/product/xyz_trig?uxf=student
If you know someone taking trigonometry, this book would be a great gift for them to use as a reference for the course they are taking.
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Trig Help: Graphing 4 - Finding an Equation from a Graph | NatokHD