MathTeachersToolkit

Students often find the concept of inverse trig functions confusing. Inverse cosine is only defined in Quadrants 1 and 2 and Inverse Sin is only defined in Quadrants 1 and 4. However, it is possible to find angles that work for these inverse trig functions in all 4 quadrants. This worksheet forces students to find all 4 reference angles and to realize that the absolute value of their sin and cosine are exactly the same in all cases. This is the free version. In the future look for this to be co

This is a simple twist on a common trigonometry assignment. Instead of having students fill out a unit circle on paper turn it into an event and have students draw the unit circle from memory on the board in front of their peers. This adds an extra element to the knowledge and confidence level needed to complete the task. Simply print the scoring sheet I included and record any errors when the student finishes and you can then punch the scores back into the spreadsheet. The grade will automatica