Answer:
Ya the person above me is right 4cd
 
        
             
        
        
        
I believe the answer is C, x-3.
        
             
        
        
        
From trigonometry we know that: 
if 
then,  (where
 (where  is an integer)
 is an integer)
This can be rewritten in degrees as:
 .............(Equation 1)
.............(Equation 1)
Now, in our case, 
Therefore, (Equation 1) can be written as:
 ..........(Equation 2)
..........(Equation 2)
Now, to find the correct options all that we have to do is replace n by relevant integers and find the values of  that match.
 that match.
For n=2, (Equation 2) gives us:  .
.
Thus, 
Now, we know that: 
Let n=-1, then:

Thus, 
Likewise, 
Only the last option  will never match
 will never match  because no integral value of
 because no integral value of  will ever give
 will ever give 
Thus the last option is the correct option.
 
        
                    
             
        
        
        
The answer to your question is 1/4
        
             
        
        
        
Answer:
 question 1 and 3
Step-by-step explanation: