DevanyR612012 DevanyR612012 29-10-2022 Mathematics contestada Solve 3cos (3x) - 2 = 0 on the interval [0, 21).13л 25л18' 1818 18π 5π 7π 11π 13π 17π99 9 99No solutionTT 11л 13л 23л 25л 35л18' 18 18 18 18 18