Half Angle

1
Half Angle Power Reducing FormulasTS
Explicitly assessing information and drawing
conclusions.

• Warm-Up
• Copy down these lovely formulas

2
Reducing Powers

• Rewrite each as a sum of first powers of cosines
  of multiple angles.
• sin4x

3
Half Angle Formulas
4
Evaluate.

1. sin(15)

5
Evaluate

• 2) cos(7p/12)

6
Evaluate
7
Solve for x in 0, 2p)
8
One last one, you try and use your calculator to
check your answers!!