What is the amplitude of the sinusoidal function m(x)= -3.5 cos x

Amplitude = 3.5

Step-by-step explanation:

The amplitude of a sinusoidal function is one-half of the positive difference between the maximum and minimum values of a function.

Given the cosine function

The maximum and the minimum values of the function   are 1 and -1, so the maximum and the minimum values of the function are 3.5 and -3.5.

Positive difference:

Half of the difference:

Isosceles triangle

Step-by-step explanation:

Any triangle whose two sides or two angles are equal is called an isoscl triangle