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5.4 Sum and Difference Formulas

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  1. 5.4 Sum and Difference Formulas In this section students will use sum and difference formulas to evaluate trigonometric functions, verify identities, and solve trigonometric equations.

  2. Section 5.4, Sum and Difference Formulas, pg. 368

  3. Example 1 Find the exact value of

  4. Section 5.4, Sum and Difference Formulas, pg. 368

  5. Example 2 Find the exact value of

  6. Section 5.4, Sum and Difference Formulas, pg. 368

  7. Example 3 Find the exact value of sin(u+v) given , where and where

  8. Section 5.4, Sum and Difference Formulas, pg. 368

  9. Example 5 Prove the cofunction identity

  10. Section 5.4, Sum and Difference Formulas, pg. 368

  11. Example 6 Simplify the expression. a. b.

  12. Section 5.4, Sum and Difference Formulas, pg. 368

  13. Example 7 Find all solutions of in the interval

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