Use a Calculator to Solve the Equation on the Interval $\cos 2 x + \cos x = 0$

question 68

Multiple Choice

Use a calculator to solve the equation on the interval [0, 2π) . Round the answer to two decimal places.
- $\cos 2 x + \cos x = 0$

• A) \(1.05,3.14,5.24\)
• B) \(0,2.09,4.19\)
• C) \(0,2.09,3.14,4.19\)
• D) \(0,1.05,3.14,5.24\)

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