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Home > PC3 > Chapter 9 > Lesson 9.1.2 > Problem 9-31

9-31.

Simplify each of the following trigonometric expressions. Homework Help ✎

  1. 1. Change all terms to sine and cosine.
    2. Get a common denominator for the terms in the parentheses.
    3. Use the Fundamental Pythagorean Identity.

  1. 1. Multiply out on the left side.
    2. Use the Fundamental Pythagorean Identity.