If a bicycle wheel makes 7 rotations a second and has a diameter of 75 cm, what cosine function describes the height of a point on the end of the wheel? O y = 75 cos(14πt) - Oy = 75 cos(14πt) + Oy = 75 cos(14πt) + Oya 752 75 2 75 2 y = 7/52 cos(7nt) + 75 2

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