Lecture (1) Algebra : Cartesian product
Trig : directed angles
Geo : Trigonometric function of an acute angle part 1
Lecture (3)
Geo : Trigonometric function of an acute angle part 2
Geo : trigonometric functions for some special angles
Alg : the polynomial function
Alg : Polynomial function
Geometry : the distance
Geo : the distance part (2)
Alg : the ratio
Alg : proportion
Alg : continued proportion
Alg : one of the ratio + Geo : midpoint