Hi guys,

Just beginning vectors but I am still not grasping the concept that well, I have looked around a bit and tried a few ideas out...

The question is

Let v = (4, 2). Find all vectors of magnitude 4 that are perpendicular to v.

Not entirely sure how to approach this... pretty awful with vectors, I calculated the magnitude of v (root 20), however I really wasn't sure what to do with that afterwards.. any help would be much appreciated.

Cheers in advance,

Sim