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5.3

5.3. Sum and Difference Identities. What you’ll learn about. Cosine of a Difference Cosine of a Sum Sine of a Difference or Sum Tangent of a Difference or Sum Verifying a Sinusoid Algebraically … and why These identities provide clear examples of how different

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5.3

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  1. 5.3 Sum and Difference Identities

  2. What you’ll learn about • Cosine of a Difference • Cosine of a Sum • Sine of a Difference or Sum • Tangent of a Difference or Sum • Verifying a Sinusoid Algebraically … and why These identities provide clear examples of how different the algebra of functions can be from the algebra of real numbers.

  3. Cosine of a Sum or Difference

  4. Example Using the Cosine-of-a-Difference Identity

  5. Example Using the Cosine-of-a-Difference Identity

  6. Sine of a Sum or Difference

  7. Example Using the Sum and Difference Formulas

  8. Example Using the Sum and Difference Formulas

  9. Tangent of a Difference of Sum

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