# The amount of sunlight in a certain city can be modeled by the function h = 15 cos (1/600 d

## Question:

The amount of sunlight in a certain city can be modeled by the function h = 15 cos (1/600^{d}), where h represents the hours of sunlight, and d is the day of the year. Use the equation to find how many hours of sunlight there are on February 10, the 42^{nd} day of the year. State the period of the function.

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Chapter #

**5**Section: 5.3 Exercises

Problem: 72

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