This would be easier for you if you put it in a graph
        
             
        
        
        
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Answer:
   (a)  cos(55°) = 11/x
Step-by-step explanation:
The marked sides are the hypotenuse (x) and the side adjacent to the given angle (11). Then the relevant trig ratio is ...
   Cos = Adjacent/Hypotenuse
   cos(55°) = 11/x
 
        
             
        
        
        
Answer:
9$
Step-by-step explanation:
The way you undo multiplication is division. If the sweater costs 27$, you divide that by 3 to get a third of the cost.
 
        
                    
             
        
        
        
Answer:
<A = right angle 
<B = acute angle 
<C = obtuse angle 
<D = acute angle 
Step-by-step explanation:
Right angle = 90 degrees
Acute angle = less than 90 degrees
Obtuse angle = more than 90 degrees