Chapter 7, 7.5 Exercises #67

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For the following exercises, algebraically determine all solutions of the trigonometric equation exactly, then verify the results by graphing the equation and finding the zeros.

8cos^{2} x − 2cos x − 1 = 0

7.2 Exercises:

7.3 Exercises:

7.4 Exercises:

7.5 Exercises:

7.6 Exercise:

Practice Exercises:

Review Exercises: