The equation for the sinusoidal function described is given as follows:
[tex]y = 4\cos{\left(\frac{1}{2}x\right)} + 2[/tex]
What is a sinusoidal function?
We want a function with a y-intercept at it's maximum value, hence we use the cosine equation, given by:
[tex]y = A\cos{\left(\frac{2\pi}{B}x\right)} + C[/tex]
In which:
- 2A is the amplitude, which is the difference between the largest and smallest value.
- C is the vertical shift, considering that the standard cosine function has range between -A and A.
The amplitude is of 8, hence 2A = 8 -> A = 4. This would represent a function between -4 and 4, but we want between -2 and 6, hence the vertical shift is of C = 2.
As for the period, we have that:
[tex]B = 4\pi[/tex]
Then, the equation is given by:
[tex]y = 4\cos{\left(\frac{1}{2}x\right)} + 2[/tex]
More can be learned about sinusoidal functions at https://brainly.com/question/26315885
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