Students use the sum and difference trigonometric identities to solve problems in this engaging, self-checking, no-prep circuit activity. The digital version uses Google Forms. The printable version is a non-editable pdf.Click HERE to SAVE 30% by buying my Slow Growing PreCalculus Bundle. As I add more PreCalculus products to my store, they will get added to this bundle. That means you get a discount on the products already included, and then you can re-download to get any future PreCalculus pro