pkdroid777
New member
- Joined
- Feb 15, 2019
- Messages
- 3
Outside temperature over a day can be modeled as a sinusoidal function. Suppose you know the temperature varies between 64 and 86 degrees during the day and the average daily temperature first occurs at 11 AM. How many hours after midnight does the temperature first reach 80.5 degrees? Round your answer to the nearest full hour.
Hello, I have been having issues with this homework problem, I know there are two things I need to do in order to complete the problem 1) figure out the equation of the word problem, and 2) make it equal to the equation and then solve.
The equation I got, was -11cos(pi/12(x-11))+75 so then I had 80.5=-11cos(pi/12(x-11))+75 after solving everything I ended up with 12/pi*cos-1(5.5/-11)+11 I then put it in my calculator I got 19 and it told me I was wrong. Im guessing its probably something to do with my phase shift.
Thanks.
Hello, I have been having issues with this homework problem, I know there are two things I need to do in order to complete the problem 1) figure out the equation of the word problem, and 2) make it equal to the equation and then solve.
The equation I got, was -11cos(pi/12(x-11))+75 so then I had 80.5=-11cos(pi/12(x-11))+75 after solving everything I ended up with 12/pi*cos-1(5.5/-11)+11 I then put it in my calculator I got 19 and it told me I was wrong. Im guessing its probably something to do with my phase shift.
Thanks.
Last edited: