Differential equation

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Student 999
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Confused on the last part on showing the difference between the highest and lowest water level after a weekName:  Screenshot 2022-05-18 at 16.24.48.png
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Last edited by Student 999; 1 month ago
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ghostwalker
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(Original post by Student 999)
Confused on the last part on showing the difference between the highest and lowest water level after a weekName:  Screenshot 2022-05-18 at 16.24.48.png
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They're just looking at value of t >= 7, i.e. after a week. For t > 7, the first term is close to 0, and the second term is 3cos(t), which varies from -3 to3, and hence the range.
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Student 999
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(Original post by ghostwalker)
They're just looking at value of t >= 7, i.e. after a week. For t > 7, the first term is close to 0, and the second term is 3cos(t), which varies from -3 to3, and hence the range.

My bad I interpreted it as the difference between water levels from t=7 and t=0
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