TES Secondary Maths Resource of the Week 20- Trigonometric Graphs
The TES Secondary Maths Resource of the Week 20 is a fantastic Excel file that shows how the graphs of sin, cos and tan can be derived from a unit circle. An excellent demonstration of the concept. I have taught this lesson getting pupils to plot and derive them themself previously. I think there is merit in a self-discovery approach but sometimes using this superb resource may be more appropriate. Thanks to aliali for uploading it.
Click here to view the resource (you will need to signup for a free TES account to download it)