Identify standard form: Identify the standard form of a cosine function.The standard form of a cosine function is y=Acos(Bx+C)+D, where A is the amplitude.
Determine amplitude: Determine the amplitude from the given function.In the given function y=−3cos(πx+2)−6, the coefficient of the cosine function is −3. The amplitude is the absolute value of this coefficient.Amplitude = ∣−3∣=3
Check for errors: Check for any mathematical errors in the previous steps.There are no mathematical errors in the calculation of the amplitude.
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