(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

For the two vectors in the figure , find the magnitude of the vector product lAl x lBl.

http://session.masteringphysics.com/problemAsset/1040325/3/yf_Figure_1_29.jpg

2. Relevant equations

lAl*lBl=lAl*lBlsin(alpha)

3. The attempt at a solution

2.8cm * 1.9cm * cos(60) = 2.66cm^2

2.8cm * 1.9cm * cos(120) = -2.66cm^2

Since they made two 60 degree, I thought the alpha was 60 but I got wrong.

Then, I came up with the 120 degree, however it is also wrong.

Where did I do wrong?

Please help me..

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Magnetic vectors

**Physics Forums | Science Articles, Homework Help, Discussion**