We started by calculating values of the sine function at easy points on our unit circle: 0, pi/2, pi, 3 pi/2 and 2 pi. We plotted these with desmos (and the graphing calculator) and the used the animation below to create the graph. We saw the range of values was between 1 and -1; the graph was periodic with a period of 2 pi. We also named the x and y -intercepts. We completed the sheet on the features of the sine graph. We also discussed how to find the amplitude and period from a given equation in the form: y = a sin (bx).

Animation of the the graphs of sine and cosine:

http://www.intmath.com/trigonometric-graphs/1-graphs-sine-cosine-amplitude.php

https://www.youtube.com/watch?v=CWjVy4iTVAI

HW: Complete the WS 13.4 Reteaching & WS 13.4 Practice 1 - 9.

Animation of the the graphs of sine and cosine:

http://www.intmath.com/trigonometric-graphs/1-graphs-sine-cosine-amplitude.php

https://www.youtube.com/watch?v=CWjVy4iTVAI

HW: Complete the WS 13.4 Reteaching & WS 13.4 Practice 1 - 9.