https://web2.0calc.com/questions/select-all-that-are-true
Yah, flipping back and forth betwen the screenshot and the Forum, I sometimes get the numbers incorrect.....
Here is pic:
Sin wave sin (x) is parent wave
Period = 24 hours 2pi/24 = pi/12 now sin (pi/12 *x)
Amplitude = (8.3-0.4) / 2 = 3.95 now 3.95 sin ( pi/12 *x)
Midline shifted UP 4.35 now 3.95 sin (pi/12 *x) + 4.35
Correct.
Reflect by making cosx - cos x shift down by subtracting 2 so : - cos x - 2
No....sorry. 3 is the amplitude of the modulated wave. Normal midline for a cos wave is y = 0 . This wave is SHIFTED DOWNWARD by 2.5 so the midline woudl be at y = -2.5 .
1 false look at the lowest point 7.5 s 4 ft it does not get back to lowest point until 17.5 s so one rev = 10 seconds
2 true Highest point 64 ft lowest point 4 ft means DIAMETER is 60 ft radius is 30 ft
3 true
4 false Lowest point is 4 ft.....at t= 0 s the ferris wheel is at 34 ft high.
Factor (x-7)(x-1) = 0 so x = 1 or 7 the lesser of which is 1
Rectangle diagonal is 4.