The law of cosine and the classification of news

The law of Cosine and the classification of news may seem like two separate things, but they are closely related. Specifically, the classification of news relies heavily on the law of cosine.

Google news is automatically sorted and organized. The so-called classification of news is nothing more than to group similar news into one category. The computer can't actually read the news, it can only calculate quickly. This requires us to design an algorithm to figure out how similar any two news articles are. In order to do this, we need to find a way to describe a news story with a set of numbers.