Please answer questions

Solve the equation on the interval 0 5 6

Solve the equation on the interval 0 s 0 < 21t. (cot0 Select the correct choice below and fill in any answer boxes in your choice. O B. The solution set is (Simplify your answer. Type an exact answer, using It as needed. Type your answer in radians. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) There is no solution on this interval.