Originally Posted by
iliketea416
I think I need a little more to answer the question but if you have two vectors, a and b, and draw straight lines through them until the meet, the angle in between is c (just an example letter). To find the scalar product of the two vectors a and b then a.b = /a//b/cos c (sorry, I don't know how to do vertical bars on this computer). Is that what you mean?
I understand that
a.
b = |
a| |
b| cosc , but my tutor mentioned that |
b .
a| is the length of the projection of vector b onto vector a. However, I don't see how it is so, as to my knowledge, the formula would be |
b .
arrow cap a|