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Indefinite Integrals Idx = x + C sin(x )dx = - cos(x)+ C andx = +1 Ianti + C cos(x)dx = sin(x) + C 1: Find S 3x2(x3 + 4)7dx using the u substitution of u = 23 + 4. 7 /2 2: Find f sin(2x)dx by making appropriate u substitution. 0