Question

Find the amplitude of y = -4 sin x.

4
pi divided by four
-4π
2π

Answer 1

4

Explanation:

The amplitude in a harmonic function of the type "A sin(x+b) +C" is in fact the absolute value of the coefficient "A" multiplying the sine expression.

So in this case, that multiplicative factor is "-4", and therefore, the amplitude is the absolute value of this : |-4|= 4