Update distance-functions.md

Author: wmwxwa

articles/cosmos-db/gen-ai/distance-functions.md

@@ -29,4 +29,10 @@ Cosine similarity measures the cosine of the angle between two vectors projected
 Two vectors are multiplied to return a single number. It combines the two vectors' magnitudes, as well as the cosine of the angle between them, showing how much one vector goes in the direction of another.
 
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