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 use Pascal's triangle.
How to identify a segment from the vertex angle in an isosceles triangle to the opposite side.
How to define a triangle midsegment and describe its special properties.
How to relate corresponding altitudes, medians and angle bisectors in similar triangles.
How to define periodic functions.
How is public policy made? Who controls the bureaucracy?
Understanding the laws of definite and multiple proportions.
How to define an altitude and draw them on acute, right, and obtuse triangles.
How to derive two more cosine double-angle formulas.