Consider the graph of the cosine function shown below.

a. find the period and amplitude of the cosine function.
b. at what values of θ for 0 ≤ θ ≤ 2π do the maximum value(s), minimum values(s), and zeros occur?

a. Amplitude: 4

Period: 1

b. The maximum values occur at

The minimum values occur at

The zeros occur at

Step-by-step explanation:

We can see from the graph that;

.

This implies that;

.

The amplitude is 4.

The function also completed one full cycle on the interval [0,1]

The period is

The maximum values occur at

The minimum values occur at

The zeros occur at

This is where the graph intersected the x-axis.

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.