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Home > CALC > Chapter 6 > Lesson 6.3.4 > Problem 6-117

6-117.
  1. Multiple Choice: Which of the following expressions is equal to ? Homework Help ✎

    I. 2 cos x

    II. −2 cos x sin x

    III. −sin 2x

    1. I only

    2. II only

    3. III only

    4. II and III

    5. none

There may be more than one correct answer.