How to use the power reduction formulas to derive the half-angle formulas.
How to use the sine and cosine addition formulas to prove the double-angle formulas.
Understanding the half-life of a radioactive substance.
How to use half reactions to understand oxidation-reduction.
How to derive two more cosine double-angle formulas.
Understanding the differences between empirical and molecular formulas.
How to define an angle of elevation or an angle of depression.
How to identify supplementary and complementary angles.
How to derive the cosine of a difference formula.
How to derive the sine of a sum formula.
How to use the quadratic formula to solve quadratic equations.
How to calculate the measure of an inscribed angle.