A slightly different worksheet that you can do at the end of the chapter on Trig formulas. Not only does it require learners to know how use the formulas, they also need to understand when you would use the trig formulas. It is low-entry worksheet where each learner determine how much they will get out of the activity.
Create your own 2-dimensional trig question.
Use, by you or one client, in a single end product which end users are not charged for. The total price includes the item price and a buyer fee.