1 Evaluate the integral: 81d$ 3321/7? W. Which trig substitution is correct for this integral? 0 a: : 81tan[9} O a: : 16 seam) O a: = 813%{9} G} a: = 9tan(8] O a: = 951n(9] C) a: = 813in{6'} B. Which integral do you obtain after substituting for a: and dd: after simplifying? Note: to enter 9, type the word theta. fl Ida C. What is the value of the above integral in terms of E3? I |+ C D. What is the value of the original integral in terms of at? I |+ C