title: about cosine similarity
body: <p>I am finding cosine similarity between documents.. I did it like this</p>
  
  <p>D1=(8,0,0,1) where 8,0,0,1 are the tf-idf scores of the terms t1, t2, t3 , t4 </p>
  
  <p>D2=(7,0,0,1)</p>
  
  <p>cos(theta) = (56 + 0 + 0 + 1) / sqrt(64 + 49) sqrt(1 +1 ) </p>
  
  <p>which comes out to be</p>
  
  <p>cos(theta)= 5</p>
  
  <p>Now what do I evaluate from this value... I don't get it what does cos(theta)=5 signify about the similarity between them... Am I doing things right?</p>