The Other Trigonometric Functions · Exercise 72
The amount of sunlight in a certain city can be modeled by the function where represents the hours of sunlight, and is the day of the year. Use the equation to find how many hours of sunlight there are on February 11, the 42^nd day of the year. State the period of the function.
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OpenStax, Algebra and Trigonometry 2e · §7.4 The Other Trigonometric Functions · Exercise 72
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