a. SOHCAHTOA

E1-01 [Trigonometry: Introducing sin(x), cos(x) & tan(x)]

E1-02 [Trigonometry: Two Triangles to Learn]

E1-03 [Trigonometry: Using the Two Triangles]

E1-04 [Trigonometry: Examples of Finding Missing Angles]

E1-05 [Trigonometry: Examples of Finding Missing Sides]

E1-06 [Trigonometry: Finding Exact Values of sin(x), cos(x) & tan(x)]