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php Programming Glossary: cosines

Formulas to Calculate Geo Proximity

http://stackoverflow.com/questions/2096385/formulas-to-calculate-geo-proximity

seen variations from the same formula Spherical Law of Cosines like this one 3956 ACOS COS RADIANS o_lat COS RADIANS d_lat.. more variations and formulas such as the Spherical Law of Cosines and the Vincenty's formulae which seems to be the most accurate.. Vincenty Formula Haversine Formula Spherical Law of Cosines The Vincenty Formula is dead slow however it's pretty accurate..

Optimising a haversine formula SQL call in PHP

http://stackoverflow.com/questions/2226489/optimising-a-haversine-formula-sql-call-in-php

improve this question You're using the Spherical Law of Cosines formula not the Haversine Formula which is slightly slower ...