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Trigonometry
1	Trig identies part 3 (part 5 if you watch the proofs)	17	Basic Trigonometry
2	Trig identities part 2 (part 4 if you watch the proofs)	18	Trigonometry word problems (part 2)
3	Proof: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)	19	Trigonometry word problems (part 1)
4	Proof: sin(a+b) = (cos a)(sin b) + (sin a)(cos b)	20	Law of cosines
5	Trigonometric Identities	21	Navigation Word Problem
6	The unit circle definition of trigonometric function	22	Proof: Law of Sines
7	Determining the equation of a trigonometric function	23	Ferris Wheel Trig Problem
8	More trig graphs	24	Ferris Wheel Trig Problem (part 2)
9	Graphing trig functions	25	Fun Trig Problem
10	Graphs of trig functions	26	Polar Coordinates 1
11	Graph of the sine function	27	Polar Coordinates 2
12	Unit Circle Definition of Trig Functions	28	Polar Coordinates 3
13	Using Trig Functions Part II	29	Inverse Trig Functions: Arccos
14	Using Trig Functions	30	Inverse Trig Functions: Arctan
15	Radians and degrees	31	Inverse Trig Functions: Arcsin
16	Basic Trigonometry II	32	Trigonometry Identity Review/Fun