Answer:
c. Cos 52 = 17/c
Step-by-step explanation:
sin(x) = cos(90-x)
 
        
             
        
        
        
The label could be written in the area marked X as "Uses a convex eyepiece lens". Then the correct option is D.
<h3>What are Sets?</h3>
Sets are the collection of well-defined elements. A set is represented by a capital letter symbol and the number of elements in the finite set is shown as curly bracket {..}.
<h3>What is the Venn diagram?</h3>
It is the representation of the sets by the diagram. And shows the condition that is generated between them by the overlapping of the circle.
Shanti began to draw a Venn diagram comparing refracting and reflecting telescopes. The two overlapping circles. 
The left circle is labeled Refracting telescopes. 
The right circle is labeled Reflecting Telescopes. 
An X in the overlap. Both as a label below and outside the overlap.
From the figure, we can say that the label could be written in the area marked X as "Uses a convex eyepiece lens".
Then the correct option is D.
More about the set link is given below.
brainly.com/question/8053622
 
        
             
        
        
        
(C) jasmyne is the one with the proportinal relationship