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Home  /  Precalculus: CTF (5e, High School Edition)  /  Chapter 7 · Analytic Trigonometry
Section 7.5

Sum and Difference Formulas

Sum, difference, and reduction formulas for sine, cosine, tangent.

4 lessons. Pick what you need.

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Chapter 7 · Analytic Trigonometry
7.1 7.2 7.3 7.4 7.5 7.6
Lesson

Lesson on Proofs of Cos(A-B) and Cos(A+B)

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Lesson

Lesson of Exercises Using the Sum and Difference of Cosine Identities

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Lesson

Lesson on the Sum and Difference Identities for Sine and Tangent

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Examples

Examples Finding the Sine of a Sum and Tangent of a Sum

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