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Home > PC3 > Chapter 8 > Lesson 8.2.1 > Problem 8-63

8-63.
  1. Use the Pythagorean Identity to simplify each trigonometric expression. Homework Help ✎

    1. cos2(θ) + sin2(θ)

    2. 1 – cos2(5)

    3. 1 – sin2(β)

    4. 1 – sin2(3δ)

    5. 4 – 4 sin2(3δ)

Review your work from problem 8-47.

Factor out a 4 first.