The temperature fluctuation on a cold winter’s day (in degrees Celsius) is modeled by , where is the time of the day expressed in hours after midnight. At what times of the day was the temperature ?
Outside temperatures over 24 hours can be modeled as a sinusoidal function. On a day with an average temperature of , the maximum temperature of is recorded at 6 pm. Find, to the nearest degree, the temperature at 7 am.
In a certain location, the temperature over the course of a day varies between a minimum of at 6 am and a maximum of . If the temperature is modeled by a sinusoidal function, what is the first time in the day when the temperature is ?