Answer:
<h2>8</h2>
Step-by-step explanation:

Answer:
2
Step-by-step explanation:
From the graph, we obtain the trigonometric function as:

The corresponding cosine function have equation.

This function is of the form: 
where
is the amplitude.
Therefore the amplitude is |2|=2
The third choice is correct
Answer:
True
Step-by-step explanation:
Sorry I was moving around taking the picture and my handwriting is sloppy. But I hope you understand how I got the answer