Final answer:
The subject of this question is Mathematics, specifically related to modeling precipitation in Chicago using a trigonometric function. The answer involves finding the average monthly precipitation for the year and the amount of precipitation in February.
Step-by-step explanation:
The subject of this question is Mathematics, specifically related to modeling precipitation in Chicago using a trigonometric function.
To answer the question, we need to find out the average monthly precipitation for the year and the amount of precipitation in February, which is the driest month.
Let's assume the trigonometric function that models the precipitation is f(t), where t represents time in months elapsed since the beginning of the year. We can then use this function to calculate the average monthly precipitation and the precipitation in February.