2 Consider the denite integral f 7 1 dz. 13'13 3:: The most appropriate substitution to simplify this integral is u 2 Then (it: = 2 (ii, and so dI = sin, for the constant c = I i: After making these substitutions and simplifying we obtain the integral / f[u) CELL where a H\"): 2 b: I a: I This denite integral. when evaluated, is