I am only looking for a confirmation of what I believe to be true. If my explaination or conclusion is not accurate I would appreciate it if the reason can be explained to me.

Background Information:

I am attempting to research a method to calculate the Latitude, Longitude, and Height of a point on the planet earth given Range, Azimuth, and Elevation of a point relative to another point where the Lat, Long, and Altitude is known. I am going to be using a geophysical library that allows me to provide it a geocentric value and it will return a Latitude and Longitude and the Geodetic Datum.

Is WGS-84 is a valid datum for a Geocentric datum?
If I provide it a WGS-84 (X,Y,Z) point should it return a WGS-84 Latitude and Longitude?

While similar this is a different question then my previous deleted question.