1 Answer

MattGrommes · Answer 1 · 2023-04-24T02:52:39+0000

A cosine function is given in the form:

$y=A\cos(x-h)+k$

where |A| is the amplitude, h is the horizontal shift (also called a phase shift) and k is the vertical shift.

The function is given to be:

$\begin{gathered} y=8\cos((1)/(4)x) \\ A=8 \end{gathered}$

Therefore, the amplitude is 8.

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