Mastering Cross and Dot Products for Test Review

[1man]

i'm reviewing for a test and I can't remember how to do the cross product of (2A)x(3B)
or how to find the angle theta when given components. or dot product: 2A . 3B

 

[willem2]

Are (2A) and (3B) normal vectors? If so, the link in your own post will tell you
how to do a cross product. If not, what are they?

 

[1man]

they are and i already know
Rz=Az+Bz
Ry=Ay+By
Rz=Az+Bz

but I am not sure how to do (2A)x(3C)

 

[1man]

or (2A)x(3B)