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Identify the period, midline, and amplitude of each of the trigonometric functions below.

(a) $f(\theta) = 9\cos(8\pi \theta) -5$
Period:
Midline: $y$ =
Amplitude:

(b) $g(x) = -5\cos(3 x)+8$
Period:
Midline: $y$ =
Amplitude:

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