Hi,
My implementation gives the following results:
cosine_similarity(father, mother) = 0.8909038442893615
cosine_similarity(ball, crocodile) = 0.2743924626137942
cosine_similarity(france - paris, rome - italy) = -0.6751479308174201
All test passed!
Are these close enough to the expected test results to legitimately pass or should I review my equations?