Answer (1,-1) 
It said I needed more than 20 characters
        
             
        
        
        
ANSWER
The correct choice is A.
EXPLANATION
The given cosine function is:

This function has an amplitude of 2.
Hence it must have range,
-2≤f(t)≤2
It has a period of 

Hence the function must complete one cycle on the interval, 
[0,½π],
[½π,π],
 etc.
The negative sign shows a reflection in the y-axis but since the cosine function is even, the function retraces itself.
The correct choice is A
 
        
             
        
        
        
Okie. i get it. you guys must like sports a lot 
        
             
        
        
        
Answer:
4 × 6
Step-by-step explanation:
2^2= 4 or 2 × 2= 4
2^3= 6 or 2 × 2 × 2= 6 
So, 4 × 6