This question already has an answer here:
What is the real radius of earth?
- Google says 6378.1 km
- Wiki says 6371 km
- And there are references for 6378.7 km
I'm using maximum radius 6378.7 km in distance calculation in spherical law of cosines formula. What would be the impact of using maximum radius rather than average radius which is 6371 km. When does using one over the other make sense?