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
-sinx + C
hope this helps!
3.48 x 10^9
I hope this is right.
Answer:

Step-by-step explanation:
x^2 + 1 = 4
x^2 = 3
