Answer:
D
Step-by-step explanation:
 
        
             
        
        
        
I think it’s B I’m sorry if I’m wrong
        
             
        
        
        
Answer:
Two non co-linear segments with a slope of 3 in a coordinate plane would mean that the two segments are parallel to each other and not attached to each other. Having the same slope is the definition of being parallel in the same plane.
Step-by-step explanation:
 
        
             
        
        
        
 Option A

<em><u>Solution:</u></em>
Given that we have to rewrite with only sin x and cos x
Given is cos 3x

We know that,

Therefore,
 ---- eqn 1
  ---- eqn 1
We know that,


Substituting these values in eqn 1
 -------- eqn 2
  -------- eqn 2
We know that,

Applying this in above eqn 2, we get



Therefore,

Option A is correct
 
        
             
        
        
        
3/47 is a rational number
p/q is a rational number, where p and q are real integers, and q does not equal to 0.