1. Trig – 4/21/2017 Simplify. 312 Homework: p382 VC, 1-8, 17-25 odds
Honors: all
Simplify.
Today’s Lesson: Double-Angle & Power-Reducing Formulas

2. Trig/Pre-Calculus You will: Honors
Today’s Lesson: Double-Angle & Power-Reducing Formulas
You will:
Use the double-angle formulas to evaluate trig functions.
Use the double-angle formulas to solve trig equations.
Honors
Use the Power-Reducing formulas to evaluate trig functions.
Use the Power-Reducing formulas to solve trig functions.

3. Double Angle Formulas

4. Double Angle Formulas Find the exact value of each trig function.
1. sin x 4. sin 2x
2. cos x 5. cos 2x
3. tan x 6. tan 2x 5 x 12

5. Double Angle Formulas Find the exact value of each trig function.
1. sin x 4. sin 2x
2. cos x 5. cos 2x
3. tan x 6. tan 2x 8 x 15

6. Double Angle Formulas
Use the following to find and 5
–12 13

7. Double Angle Formulas
Use the following to find and 5
–12 13

8. Double Angle Formulas
Use the following to find and 5 3 4

9. Double Angle Formulas
Use the following to find and 5 3 4

10. Solving a Multiple-Angle Eq
Solve.
Double-Angle Formula

11. Solving a Multiple-Angle Eq
Solve.
Double-Angle Formula

12. Power-Reducing Formulas Honors

13. Power Reducing Formulas
Rewrite sin2x as a sum of first powers of cosines of multiple angles.

14. Power-Reducing Formulas
Rewrite sin4x as a sum of first powers of cosines of multiple angles.

15. Power Reducing Formulas
Rewrite tan4x as a sum of first powers of cosines of multiple angles.