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Home  /  College Algebra and Trigonometry (7e)  /  Chapter 7 · Trigonometric Identities and Equations
Section 7.3

Sum and Difference Identities

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

4 lessons. Pick what you need.

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Chapter 7 · Trigonometric Identities and Equations
7.1 7.2 7.3 7.4a 7.4b 7.5 7.6 7.7
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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