Question

what is the amplitude $f(x)=-5cos(x)$?

Explanation:

Step1: Recall the formula for amplitude

For a function \(y = A\cos(x)\), the amplitude is \(|A|\).

Step2: Identify \(A\) in the given function

In \(f(x)=- 5\cos(x)\), \(A=-5\).

Step3: Calculate the amplitude

Amplitude \(=| - 5|=5\).

Answer:

\(5\)