February 25, 2017

Homework Help: Calculus

Posted by Dominick on Friday, May 1, 2009 at 7:24pm.

A light is suspended at a height h above the floor. The illumination at the point P is inversely proportional to the square of the distance from the point P to the light and directly proportional to the cosine of the angle θ. How far from the floor should the light be to maximize the illumination at the point P? (Let d = 6 ft.)

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