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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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