ANSWER

EXPLANATION
The given angle is 870°.
870°-360°-360°=150°
This means that:
870° is coterminal with 150°, hence its terminal side is in the second quadrant.
It makes an acute angle of 30° with the x-axis.
Note that cotangent is negative in the second quadrant,
Hence, 

The first option is correct.
 
        
             
        
        
        
Answer:
What are the following?
Step-by-step explanation:
 
        
                    
             
        
        
        
16731 should be the answer
        
             
        
        
        
90% of the milkshakes had whipped cream because 90/100 as a percentage is 90%