2. Evaluate the integral using trigonometric substitution dx TVx2 4 Use the substitution x - aseco and the identity tan? 0 - sec? 0 - 1. a. First, write down your substitutions: b. Now plug in your substitutions and integrate with respect to 9. c. Finally, express your answer in terms of r instead of 0. In order to receive full credit, you must draw the triangle and label its sides. Write your final answer here: A correct answer with incorrect preceding steps will receive zero points