I have looked on here for an answer to my question however the answers I found were how to find the actual angle and not broken down into theida and phi so here is my question:
If I have two vectors a and b how can I calculate the two Euler angles between them?
I do know the total angle is found by:
What I am looking for is this scenario:
where the red line is vector a and the purple line is vector b. The angle between them can be broke up onto the two planes. Those two angles are what I am trying to find.