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Real-World Applicationsmedium
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A homeowner is installing a solar panel on a south-facing roof that has a slope of 25∘25^{\circ}25∘ relative to the horizontal. To maximize winter energy collection, the solar panel should be tilted at an angle of 45∘45^{\circ}45∘ relative to the horizontal. What angle (in degrees) should the panel make with the roof surface?