In this lesson, students contribute data points to build graphs of the sine and cosine functions. The transition from trig ratios to trig functions is a particularly difficult one, but it is also one where the social space of the TI-Navigator™ Activity Center can provide powerful assistance. By taking ownership over different individual values of the sine and cosine functions, students can bootstrap their way from a ratio-based understanding of trig to a function-based understanding.
Before the Activity
If you are using the TI-Navigator System with the TI-73 you will need the attached .pdf file.
Make sure you are familiar with the following TI-Navigator™ system functions: Send to Class, Collect from Class, Screen Capture, Quick Poll and Activity Center
Download the attached activity resource files to your computer
During the Activity
Build from an understanding of trigonometric ratios toward basic concepts in trigonometric functions
Grow from a numeric representation of trigonometric functions to a graphical representation
After the Activity
Assess your students understanding by using the Quick Poll feature as desired.