19- 12 Evaluate the integral: 112-2 (A) Which trig substitution is correct for this integral? Or = 3sin(0) Or = 9sin(0) Or = 3 sec(0) Or = 3 tan(0) Or = 9sec(0) Or = 9tan(0) (B) Which integral do you obtain after substituting for T and simplifying? Note: to enter 0, type the word theta. (C) What is the value of the above integral in terms of ? + C (D) What is the value of the original integral in terms of I? + C