[填空题]
The temperature, T, in degrees Ceav o6qn/v8d ;alsius, in Istanbul during a particufc-6u/ fgsvuo1o (k i2lar winter day is modelled by the equatio vgc6k(f o21fus/i -uon
T=asin(b(t−c))+d,0≤t≤24,where a,b,c,d∈R and t is the elapsed time, in hours, since midnight.
The graph of T versus t is shown below.
The lowest temperature was recorded at 3:30 am and the highest temperaturetemperature was recorded at 3:30 pm.
1.Write down the value of:
(1)a;
(2)d.
2.Find the value of b. ≈
3.Find the smallest possible value of c, given c>0.
The temperature, T, in degrees Celsius, in Istanbul during a particular summer day is modelled by the equation
T=5sin(0.262(t−8))+25,0≤t≤24,where t is the elapsed time, in hours, since midnight. c =
4.Find the time, in hours and minutes, when the temperature:
(1)reaches its maximum;
(2)first drops below $24^{\circ}C$.
5.The temperature is below $24^{\circ}C$ for ℎh hours and m minutes. Find
the value of h and the value of m. h = m =
