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3) Evaluate (5pts) 4) 23 x - 4 dx and 23 (x -4) dx. Compare your answers. Compute fx sin (x) cos (x) dx.

3) Evaluate (5pts) 4) 23 x - 4 dx and 23 (x -4) dx. Compare your answers. Compute fx sin (x) cos (x) dx. a) Consider the substitution U= sin (x)? u = cos (x)? b) Consider the substitution ? (3pts) (3pts) c) Your thought on the answers (a) and (b)? Are they both correct answer? Why? (4 pts)

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