Solve the equation for exact solutions over the interval [0, 21). :- cos2x : 1 Select one: O a. 工 工 4' 2' 4 57 3T 7T T. {5 } {i #} b. 117 12 12 12? 13T 23л 12 c. O d. 13 3 3 3 27 47 57 O e. 1 2' 6 2 11T

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