Web Sites > Profile: Addition Formulas for Sines and Cosines

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Title:   Addition Formulas for Sines and Cosines
Description:   Describes how the Sine and Cosine Addition Formulas can be derived by using vectors and how these formulas can be remembered relatively easily.


  Kids and Teens > School Time > Math > Trigonometry


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Dave's Short Trig course - Covers basic definitions and concepts in beginning trigonometry.