(Modeling) Solve each problem. See Example 5.
Length of a Day The number of daylight hours H at any location can be calculated using the formula
where D and L are defined in Example 5. Use this trigonometric equation to calculate the shortest and longest days in Minneapolis, Minnesota, if its latitude L = 44.88° , the shortest day occurs when D = -23.44° , and the longest day occurs when D = 23.44° . Remember to convert degrees to radians. (Source: Winter, C., R. Sizmann, and L. L. Vant-Hull, Editors, Solar Power Plants, Springer-Verlag.)
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