Angle between two vectors matlab

Question

I want to calculate the angle between 2 vectors V = [Vx Vy Vz] and B = [Bx By Bz]. is this formula correct?

VdotB = (Vx*Bx + Vy*By         


        

Answer 1

Based on this link, this seems to be the most stable solution:

atan2(norm(cross(a,b)), dot(a,b))