Answer:
cot²x
Step-by-step explanation:
Using the identity
sin²x + cos²x = 1, then
1 - sin²x = cos²x
1 - cos²x = sin²x
Thus
 =
 =  = cot²x
 = cot²x
 
        
             
        
        
        
Answer:
C.
Step-by-step explanation:
Simply multiply 50 by 3/8
 
        
             
        
        
        
Answer:
x=2
Step-by-step explanation:
In the picture. 
I hope that it's a clear solution.