Question 19 of 20 This question: 1 point(s) possible Solve the equation for solutions in the interval [0,2x) by first solving for the trigonometric function. (tanx+1)(3 cotx-1)=0 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The solution set is (Simplify your answer. Type an exact answer, using it as needed. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) OB. The solution set is the empty set.