Trig and the Unit Circle

   Instructional Videos of Prior Concepts

       Standard Postion and Basic Trig Ratios 

This video addresses the concept of a rotational angle and a reference angle.  It also shows how we determine the Trig Ratios using the coordinates of points on the terminal arm, which then leads to the CAST rule.

       Exact Values in all Quadrants 

This video continues the explanation of determining the value of any given Trig Ratio from the coordinates of a point on the terminal arm.

       Solving Simple Trig Equations 

Given an equation, this video shows multiple examples of solving.

       Special Triangles and Exact Values 

This video develops the exact value trig ratios for select reference angles (30, 45 and 60) 

       Solving Simple Trig Equations: Exact Values 

Again, given an equation, this video shows multiple examples of solving, but now focuses on using exact values.