karleygirl1886 karleygirl1886 13-12-2022 Mathematics contestada In Exercises 17–24, use the indicated substitution to evaluate the integral. Confirm your answer by differentiation. 17. Jsin 3x dx, u = 3x 17. ( sin 3x a x ) - el se 18. Jx cos (2x2) dx, u = 2x2 19. Jsec 2x tan 2x dx, u = 2x