The video addresses the symmetry of even and odd functions and how to test algebraically whether or not a function is even or odd. 

1. Special Triangles
2. Unit Circle
3. Trig to a Point
4. Right Triangle: Finding 5 Trigonometric Functions
5. Proving Trig Identities (Part I)
6. Proving Trig Identities (Part II)
7. Proving Trig Identities (Part III)
8. Proving Trig Identities (Part IV)
9. Find Theta Known Value
10. Evaluate the Sin
11. Similar Triangles
12. Graphing Sin(x) and Cos(x)
13. Even and Odd Functions