To solve the problem you must know that to change from Cartesian to polar coordinates you must write:
 x = rcos (θ)
 Where "r" is the radius
 Likewise y = rsin (θ)
 Therefore, in the expression r = 3cos (θ) one can write r as:
 r = x / cos (θ)
 So:
 x / cos (θ) = 3cos (θ)
 x = 3cos ^ 2 (θ)
 The same for y ...
 y = rsin (θ)
 y = 3cos (θ) sin (θ).
  Finally the correct answer is option 2.
 x = 3cos ^ 2 (θ) y = 3cos (θ) sin (θ).
        
                    
             
        
        
        
You need to divide 320000 by 2 since the speed was divided by 2. The final answer is ...... 160000 Joules. 
I hope this helped!!!! :D
        
             
        
        
        
Answer:
123°
Step-by-step explanation:
Since, measure of minor arc is equal to the measure of its corresponding central angle. 
Measure of central angle = 123°
So,? = 123°
 
        
             
        
        
        
Answer:
y= -x-5
Step-by-step explanation:
m=1-(-5)/-4-2
m=-1
-1= -x
y=-x-5
 
        
             
        
        
        
Answer:
4/5 is the slope
Step-by-step explanation:
the formula is y=mx +b
m = slope
b= y intercept
Therefore, the slope in 4/5