1. Other Trigonometric Identities
Dr. Shildneck
Fall, 2014

2. Power-Reducing Formulas
An extension of the double-angle formulas are the following.

3. Example 1
Rewrite the expression as a sum of first powers of the cosines of multiple angles.

4. Product to Sum Formulas
An extension of the sum-difference formulas are the following.

5. Example 2
Rewrite the expression as a sum or difference.

6. Sum to Product Formulas

7. Example 3
Find the exact value of the expression.

8. Example 5
Rewrite the expression as a product of sines and cosines of multiple angles.

9. Example 6
Solve the equation on the interval [0, 2π).

10. Example 7
Verify.

11. ASSIGNMENTS
Alternate Text Page 395 #63-84 (m3), 85, 87, (m3) **Add Page 394 #24-36 (m3) Foerster Page 420 Q1-Q10, #17-20, 34