In the process of calculating that: cos³ (112) de a substitution is made in the variable u, then it is true a) S [ cos³ (112) dz = [(1 − u²) du b) cos² (112) dx = (1+²) du c) cos³ (112) dx = d) cos(1 11 √(1-u²) du 11 cos³ (11x) dx = [(1 + u²) du

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