TRIG WORKSHEET—SUM/DIFFERENCE IDENTITIES
Section 8.5 Sum and Difference Formula- Extra Practice NAME_______________________
Part 1: Using the sum & difference identities, condense each of the following and express as a trig function of a single angle.
1. [pic] 2. [pic]
3. [pic] 4. [pic]
5. [pic] 6. [pic]
Part 2: Use the sum & difference identities with unit circle values to find exact answers for the following:
7. [pic] 8. [pic]
Part 3: Given: [pic] , [pic], and [pic] , [pic], find the following:
9. [pic] 10. [pic] 11. [pic]
Part 4: Solve each of the following equations over the interval [pic].
12. [pic]
13.. [pic]
Answers:
1. [pic] 2. [pic] 3. [pic] 4. [pic] 5. [pic] 6. [pic] 7. [pic] 8. [pic] 9. [pic] 10. [pic] 11. [pic] 12. [pic] 13. [pic]
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