Calculus basketball gym question?

Chris M

New member
A basketball gymnasium is 40 meters high, 80 meters wide and 200 meters long. For a half time stunt, the cheerleaders want to run two strings, one from each of the two corners above one basket to the diagonally opposite corners of the gym floor. What is the cosine of the angle made by the strings as they cross? Give your answer correct to 3 decimal places.

could you tell me how you set up the vectors and if indeed all you did was find the angle between the two vectors?
i need a simplified explanation on how to find out what the vectors of this example are, i dont need to know how to find the angle itself
 
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