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Use a Graph to Show Average Body Temperature over 24 Hours

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2016-03-26 20:20:34
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Trigonometry For Dummies
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You can use the graph of a trigonometry function to show temperature change over time. For example, the temperature of a person’s body fluctuates during the day instead of staying at a normal 98.6 degrees. And actually, not everyone has a “normal” temperature. Lots of people run either hot or cold.

The body temperature of a certain person over a 24-hour period.
The body temperature of a certain person over a 24-hour period.

If you’re one of the special people with a normal temperature, then your temperature goes up and down by about 1 degree each day. The formula T(x) = sin(x + 0.262) + 98.6 may be a model of your temperature during a 24-hour period. The variable x is the number of hours since midnight, so this function uses a 24-hour clock. The temperatures are given in degrees Fahrenheit. The graph is in radians, so you can enter the numbers for the hours. The preceding figure shows what a graph of the temperatures may look like, noting a few times and temperatures.

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Mary Jane Sterling (Peoria, Illinois) is the author of Algebra I For Dummies, Algebra Workbook For Dummies, Algebra II For Dummies, Algebra II Workbook For Dummies, and many other For Dummies books. She taught at Bradley University in Peoria, Illinois for more than 30 years, teaching algebra, business calculus, geometry, and finite mathematics.