_ 303:2 Evaluate the integral: d:1: J81 :1:2 (A) Which trig substitution is correct for this integral? 0 a: : 81 tan[9) O :1: = Qsec(9) O a: = 815i11(9) O a: = 81 sec(t9) O a: 2 9133.110?) a: = 95in(9) (B) Which integral do you obtain after substituting for a: and simplifying? Note: to enter 6', type the word theta. /[ we (C) What is the value of the above integral in terms of 9? +C {D} What is the value of the original integral in terms of x? i i+c