Asked by Lilly
The equation y = 20sin(0.5θ - 2) + 40 models the monthly temp for a certain city.
Use the equation to predict the temperature in the city during December. Thanks
Use the equation to predict the temperature in the city during December. Thanks
Answers
Answered by
Steve
assuming θ is the month, just plug in θ=12.
Come on back if you don't like the answer.
Come on back if you don't like the answer.
Answered by
Lilly
Still don't get it, so yes need more help.
Answered by
Reiny
Did you make sure your calculator was set to Radians ?
(press DRG until you see RAD displayed)
Here are my keystrokes
.5
x
12
-
2
=
sin
=
x
20
+
40
=
and you should get 24.86°
(Of course you can see that since sin(????) ranges from -1 to +1, the temperature must range from a minimum of 20 to a maximum of 60, so hoping the units are Fahrenheit and not Celsius
Sounds like rather dismal place to be )
(press DRG until you see RAD displayed)
Here are my keystrokes
.5
x
12
-
2
=
sin
=
x
20
+
40
=
and you should get 24.86°
(Of course you can see that since sin(????) ranges from -1 to +1, the temperature must range from a minimum of 20 to a maximum of 60, so hoping the units are Fahrenheit and not Celsius
Sounds like rather dismal place to be )
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