How to derive the cosine of a difference formula.
Understanding the differences between empirical and molecular formulas.
Understanding potential difference.
How to derive the sine of a sum formula.
How to define a tangent line; how to determine the angle a radius to a tangent forms.
How to define the tangent function for all angles.
How to evaluate the tangent of 3*pi/4.
How to use the sine and cosine addition formulas to prove the double-angle formulas.
How to factor the sum or difference of cubes.
How to multiply radicals together when they are different roots.
How to use the quadratic formula to solve quadratic equations.
How to find the length of tangent segments drawn to a circle from the same point.
How to restrict the domain of tangent so it will have an inverse function.
How to find the midpoint of two points.