Odgovor: # x = pi / 3 + 2kpi # # x = -pi / 3 + 2kpi # Pojasnilo: # 2cos ^ 2x + 3cos-2 = 0 # #sqrt () = sqrt (25) = 5 # # t_1 = (- 3-5) / 4 = -2 # # t_2 = (- 3 + 5) / 4 = 1/2 # # cosx = 1/2 # # x = pi / 3 + 2kpi # # x = -pi / 3 + 2kpi # k je resničen