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	U7L4 Ex.1B: Using the Sum Identity for Cosine (wolferobynm) View
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	U7L3 Solving Trig Equations: 1/(tan^2(x)+1)=3/4 (wolferobynm) View
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	U7L3 Solving Trig Equations: 2sin^2(x)-1=1/sec(x) (wolferobynm) View
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	U7L3 Solving Trig Equations: cot(-x)/csc(-x)=1/2 (wolferobynm) View
	U3L1 Ex. 4 Critcial Thinking about Polynomials (wolferobynm) View