Vector to rotation

Sorry if it's a dupe, I can't seem to find the answer in the forum.

Let's say I have point represented with the vector <a,b,c>. This also represent a rotation of this vector from the axis x to that position (where the vector would have been a zero rotation <0,0,0,1>.

If I'm not mistaken, I could calculate that rotation using:

rz = llAtan2(a,b);
ry = llAtan2(b,c);
rx = llAtan2(c,a);
r = llEuler2Rot(<rx,ry,rz>;

but I'm wondering if thre's any other simpler method that would avoid using 3 trigonometric functions.

Any idea?

Thanks

llRotBetween(<1,0,0>,<a,b,c> unless I'm being more than usually stupid (which is certainly possible).

Thanks Argent. I completely missed that function!!