How to solve a simple sine equation: sin (theta) = 1/2.
How to solve a sine equation by factoring: 4 [sin(theta)]^2 = 2.
How to derive the equation for a circle using the distance formula.
How to identify the graph of a stretched cosine curve.
How to describe the unit circle. How to draw the unit circle and label its parts. How to strategize about finding coordinates on the unit circle.
How to derive the equation for the distance between two points using the Pythagorean Theorem.
How to simplify square roots using two different methods.