Answer:
choice 1 and choice 3)  (1,8) and (7,1)
Step-by-step explanation:
 
        
             
        
        
        
Answer:
13.5
Step-by-step explanation:
 
        
             
        
        
        
#2 5.88 #3 6.510 #4 7.578 #5 9.835 #6 11.910 #7 3.72
        
             
        
        
        
Answer:
cot²x
Step-by-step explanation:
Using the identity
sin²x + cos²x = 1, then
1 - sin²x = cos²x
1 - cos²x = sin²x
Thus
 =
 =  = cot²x
 = cot²x