I'm getting the distance between two locations (lat/long) using Pythagoras theorem.
my data look like this (I use microdegrees because I have limitations)
I have a few limitation, I'm building an application for a cell phone and using decimals and functions like $\sin, \cos$ are very expensive and take a lot of time. Also, I'm doing this calculation more than $1000$ times.
Pythagoras works fine, but I need to convert the result distance to meters. The radius is the Earth's radius.
I do not care about precession because the points are very close too each other and the arc would not be much.
How can I convert the resulting distance using Pythagoras to meters? Is there a better way to do it, than using Pythagoras?