Answer: dydx=2sec2(x)tan(x)
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
This is true 
Step-by-step explanation:
10x1 is 10. 10x10 is 100. but if u did 100x10 you would add the amount of zeros total. which would be 1000. so 400x10 is 4000
 
        
                    
             
        
        
        
When you have a power to a fraction, you simply take it by the top and then by the bottm. 
So, split it into two: (2)^4 and (5)^4 
Solve: (2)^4=16
(5)^4=625
So the fraction is: 16/625
Check to see if it reduces: It doesn't. (Odd and even numbers that have no common multiples). 
Therefore, that's the answer.
        
             
        
        
        
X=1
F(x) = 2
I am pretty sure I hope this helps
        
             
        
        
        
Answer:
I and IV
Step-by-step explanation:
cosine is positive/greater than 0 in quadrants I and IV. Its just a rule of the unit circle.
Can remember by All Star Trig Class
meaning all the trig funtions are positive in quadrant I
sin is positive in II
tan is positive in III
and cos is positive in IV