# Thread: Stuck with Vector Question

1. ## Stuck with Vector Question

Hey guys! I am just stuck with a simple vector question and I need a little help!

if possible can I get some help?

2. Originally Posted by mathematicallyretarded
Hey guys! I am just stuck with a simple vector question and I need a little help!

if possible can I get some help?

1. Determine the vector $\displaystyle \overrightarrow{AB}=(8,2)$. And now calculate the length of $\displaystyle \overrightarrow{AB}$.

2. As I've noticed in your previous post you know how to get a unit vector. Go on!

3. Keep in mind that the positive x-axis points in the same direction as the vecor $\displaystyle \vec a = (1,0)$

3. Originally Posted by earboth
1. Determine the vector $\displaystyle \overrightarrow{AB}=(8,2)$. And now calculate the length of $\displaystyle \overrightarrow{AB}$.

2. As I've noticed in your previous post you know how to get a unit vector. Go on!

3. Keep in mind that the positive x-axis points in the same direction as the vecor $\displaystyle \vec a = (1,0)$
ok i think i got it right up to question 3. I think i'm getting confused about which angle to work out.

I think i just needed to plot the AB vector and find the angle between the vector line and x-axis