Use an identity to solve the following equation on the interval [0,2x). sin 2x = - 12 cos x Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. X= 1'4 2'2 (Use integers or fractions for any numbers in the expression. Type an exact answer, using it as needed. Use a comma to separate answers as needed.) O B. There is no solution