Question

multiple choice 1 point
find the amplitude of ( f(x)=-4cos(2x) )
4
-4
1/4
-1/4

Explanation:

Step1: Recall the formula for amplitude

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

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

In \(f(x)=- 4\cos(2x)\), \(A=-4\).

Step3: Calculate the amplitude

Amplitude \(=|A| = |-4|=4\)

Answer:

4