Question: 1. (20 points). By using integration by parts, find the following integrals. a. x2 In x dr b. 2. (15 points each). Find the following

1. (20 points). By using integration by parts, find the following integrals. a. x2 In x dr b. 2. (15 points each). Find the following trigonometric integrals by using the techniques or the results given in the lecture notes. a. sin a cos r dr b. J. cos (#x) sin ("z z ) da. C. tan' r dr d. sec' r dr
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