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Versine and haversine were used the most often.

The haversine formula could yield accurate results without requiring the computationally expensive operations of squares and square roots.

Now that computers are so powerful, the haversine has gone the way of the floppy disc.

Another advantage to the versine and haversine is that they can keep you from having to square something.

But the haversine may have been more important in more recent history, when it was used in navigation.