z49+z (A) Which trig substitution is correct for this integral? Ox = 7 sin(0) O x = 7 sec (0) Or = 7 tan(0) O x = 49 sin(0) 49 sec (0) 01 = 49 tan(0) (B) Determine the sides of the triangle: A = B = C A B C= (C) Which integral do you obtain after substituting for z? Simplify as much as poss Note: to enter 8, type the word theta. de (D) What is the value of the above integral in terms of ? (Don't forget the +C.) (E) What is the value of the original integral in terms of a? (Don't forget the +C.)