Space is a way of joining together points, lines and... 
Shapes
        
             
        
        
        
Answer:
x=πn, n∈Z
Step-by-step explanation:
if sin²2x=1-cos²2x, then
1-cos²2x-2cos2x+2=0; ⇒ cos²2x+2cos2x-3=0; ⇔ (cos2x+3)(cos2x-1)=0;

 
        
             
        
        
        
Answer:
2.080
2.0800
2.08000
Step-by-step explanation:
We can write 2.08 in infinite ways by simply adding zeros.
 
        
                    
             
        
        
        
<h2>
Explanation:</h2>
Hello! Remember you have to write complete questions in order to find good and exact answers. Here I'll assume that you need a relationship between D and N. So we know some facts:
- As N increases, then D decreases
So this is an inverse relationship. We can write this as:

Since N lies in the denominator, as it increases then D will decrease. So this is a correct relationship
 
        
        
        
The area of a circle is pi × radius^2. 
Diameter / 2 = radius.
4 / 2 = 2
The radius is 2. Plug this value into the area formula.
A = pi(2)^2
Area = 12.57