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## Homework Statement

A basketball gymnasium is 25 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?

## Homework Equations

**||A||||B||**cos(theta)

## The Attempt at a Solution

So far I have interpreted the two strings as the vectors:

P1 = -80i + 200j + 25k

P2 = 80i +200j +25k

The magnitude of both the strings is √47025m

^{2}≈ 216.85m.

I'm just not sure the next step to take.