Using a Power-Reducing Identity (7.7.2)

Question 1

• Power-reducing identities allow you to write trig expressions with powers as equivalent expressions without powers.

Answer 1

• Power-reducing identities allow you to write trig expressions with powers as equivalent expressions without powers.

Question 2

• The power-reducing identities:
• cos2θ = (1 + cos(2theta)/2
• sin2θ = (1 - cos(2theta)/2

Answer 2

• The power-reducing identities:
• cos2θ = (1 + cos(2theta)/2
• sin2θ = (1 - cos(2theta)/2