How to restrict the domain of cosine so it will have an inverse function.
The definition and types of imagery.
How to restrict the domain of sine so it will have an inverse function.
How to define periodic functions.
How to beat your teacher at circle tac tac toe.
Understanding the laws of definite and multiple proportions.
Vocabulary and formulas for the area of a circle
How to derive two more cosine double-angle formulas.
How to evaluate expressions like tan(sin (4/5))^(-1).
How to use the unit circle to derive identities that are useful in graphing the reciprocal trigonometric functions.
How to determine if two triangles in a circle are similar and how to prove that three similar triangles exist in a right triangle with an altitude.
How to calculate the area of any triangle using two sides and an included angle.