- #1

stolencookie

Member advised that homework must be posted in one of the homework sections

I am having trouble with this proof. I just need a step in the right direction. Let u and v be vectors.

(u+v)*(u-v)=0, then IuI=IvI I have to use properties of the dot product.

I started off by combining both using this property u*(v+w)=u*v+u*w (u,v,w are vectors)

I got lost in all of my mess, after I combined them. Was this a good place to start? I am just so lost right now.

(u+v)*(u-v)=0, then IuI=IvI I have to use properties of the dot product.

I started off by combining both using this property u*(v+w)=u*v+u*w (u,v,w are vectors)

I got lost in all of my mess, after I combined them. Was this a good place to start? I am just so lost right now.