I have a vector, $v$ which is a direction vector from the origin
An example is $[0.8,-0.2,-0.55]$
How would I go about calculating the angles you would have to rotate $[0,1,0]$ through the $x$, $y$ and $z$ (although I understand there would only be two angles) axes in order to produce this direction vector? I know how to use rotation matrices and assume they have something to do with it, but I can't make the mental step required to link it all together.