Suppose that you want to re-write an integral using a substitution, in this case, sec' r tanada = / udu Determine the correct substitution that will accomplish this. That is, find u as a function of a that allows you to re-write the integral as shown above. The function and differential pair u, du we want is Note: answer should be a list in the form u = f(x), du = f'(x)dx. This problem is worded different from other problems because there are two ways to work the problem. Part 2. Evaluate the indefinite integral above in terms of u. udu = Note: answer should be in terms of u only Part 3. Back substituting in the antiderivative you found in Part 2. above we have sec' x tan edx =