Calculate rotations to look at a 3D point?

Question

I need to calculate the 2 angles (yaw and pitch) for a 3D object to face an arbitrary 3D point. These rotations are known as \"Euler\" rotations simply because after the fir

Answer 1

Talking about the rotation of axes, I think step 3 should have been the rotation of X'-, Y''-, and Z'-axes about the Y''-axis.