Integration by Parts Evaluate the integrals in Exercises 1-24 using integration by parts. 15. / x3el dx 1. x sin dx 2. 0 cos TO de 17. (x2 - 5x)et dx 3. 12 cost dt 4. x sin x dx 19. ( xset dx 5. / x In x dx 6. x' In x dx 21. e sin o de 7. xe dx 8. xe 3d dx 23. ex cos 3x dx 9. x2 e * dx 10. ( x2 - 2x + 1) e2 dx Using Substitution Evaluate the integrals in Ex 11. tan ly dy 12. sin y dy to integration by parts. 13. x sec x dx 14. 4x sec2 2x dx 25. eV3s+9) ds