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11. A movie screen on a wall is 20 feet high and 10 feet above the floor. At what distance x from the front

11. A movie screen on a wall is 20 feet high and 10 feet above the floor. At what distance x from the front of the room should you position yourself so that the viewing angle of the movie screen is as large as possible? (See diagram.) P=0-2 =zan-(30)-tan-(10) 20 10

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