A light is suspended at a height h above the floor. The illumination, I, at a point P is inversely proportional to the square of the distance, r, from the point P to the light and directly proportional to the cosine of the angle 0. Assume k is the constant of proportionality. OI= Which of the following can be used to represent the illumination at point P? k OI= cos(0)h² OI= light A h OI= kcos(0) h² k cos(0)² P kcos(0) ²

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