Trigonometry Help: Parametric Equations 1

We eliminate the parameter t and find we have the equation of an ellipse. This video appears in Trigonometry, published by XYZ Textbooks. The video appears in the eBook and is also accessible through one of the QR codes in Chapter 6 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. More at www.mathtv.com and xyztextbooks.com.