With one download, you can have 22 circuits to use with your precal / trig / advanced algebra students throughout the year. Several of these circuits are free on my TpT store and the other 15 are not. This bundle includes a variety of topics from trig identities to asymptotes. Please download a free circuit and do it for yourself to see how the format works. The answers are embedded in the circuit -- it is how the students move from one question to the next. For this reason there is no answer key provided. I would recommend the free asymptotes or the free domain and range circuit to try first before purchasing this bundle.
The teacher who purchases the bundle should download it and print it and then work through some of the circuits to see when they might be used in the classroom. Some teachers start trig right away -- then you will want to use those circuits first. Other teachers work with polynomial or rational functions first. You get the idea.
If you copy and paste this link you can see my store sorted for precal / trip and these are the circuits in the bundle. You can read the product descriptions to see if they are resources you'd like to have for your students. https://www.teacherspayteachers.com/Store/Virge-Cornelius-Mathematical-Circuit-Training/Category/Precalculus-Trigonometry-195823
My colleagues and I check our work very carefully, and hundreds (maybe thousands) have students have worked through all of these circuits, but if you suspect there is an error, or if you get stuck, please email me at firstname.lastname@example.org