The sinusoidal function that represents the graph is equal to y = 1.5 · cos (2π · t/8) - 3.
How to derive a sinusoidal function
In this question we must derive a sinusoidal function based on two given points. Sinusoidal functions are periodic functions that uses trigonometric functions and have the following form:
y = A · cos (2π · x/T) + B (1)
Where:
- A - Amplitude
- T - Period
- B - Vertical midpoint
The horizontal distance between the midline and the maximum point is equal to a quarter of the period. Hence,
T = 4 · (2 - 0)
T = 8
The vertical midpoint and amplitude of the sinusoidal function are now calculated:
Vertical midpoint
B = - 3
Amplitude
A = - 1.5 - (- 3)
A = 1.5
Then, the sinusoidal function that represents the graph is equal to y = 1.5 · cos (2π · t/8) - 3.
To learn more on sinusoidal functions: https://brainly.com/question/12060967
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