Answer:
35/37
Explanation:
In this question, we are to calculate the ratio that represents the cosine of angle O 
 
Firstly, please check the attachment for the diagram of the triangle. 
 
Mathematically, the trigonometric term Cos means the ratio of the length of the adjacent to that of the hypotenuse 
 
The hypotenuse is the longest length which is 37 which represents the length ON 
 
The side adjacent to angle O is the side OP which is 35 
 
Thus, the ratio representing the cosine of angle O is 35/37