You were right. I was missing the picture. I can use the formula that you gave above because the angle is 90 so I was right before.
Thanks for your help is suggesting that I was missing some information.
[b]1. Find axb: Given the magnitude of lal=3 and the magnitude of lbl=2.
[b]2. Since I have the magnitudes, I thought maybe I could use the equation of axb=lal lbl sin theta.
[b]3. I thought since I am trying to find axb that I could use 90 as the angle theta to find axb. I am...