# Unit vector?

1. Mar 1, 2010

### milan666

1. The problem statement, all variables and given/known data
Im given two vectors and im told to find theyre unit normal vector.

2. Relevant equations

a x b

3. The attempt at a solution
I used the cross product of the 2 vectors to find the normal vector, however, it came out to be i + j + k. My question is, is this already a unit vector or do i need to use the equation $$\hat{}n$$ = n/$$\left|n\right|$$?

2. Mar 1, 2010

### sumit sawai

i+j+k is not a unit vector unit vector has magnitude 1 unit vector in the direction of i+j+k is (i+j+k)/3^.5

3. Mar 1, 2010

### milan666

Understood, thank youuuuuu.