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Home > PC3 > Chapter 8 > Lesson 8.1.2 > Problem 8-35

8-35.
  1. You know that sin2(θ) + cos2(θ) = 1. Homework Help ✎

    1. What does sin2(2θ) + cos2(2θ) = ?

    2. What does sin2(θ 2 – 2) + cos2(θ 2 – 2) = ?

Let w = 2θ.
What is sin2(w) + cos2(w)?

Let w = θ2 − 2.