This question: 1 point(s) possible Submit test The following equation involves a trigonometric equation in quadratic form. Solve the equation on the interval [0, 2x). 2 cos 2x + 3 cos x = -1 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. x= (Type an exact answer, using as needed. Use a comma to separate answers as needed. Use integers or fractions for any numbers in the expression.) OB. There is no solution.