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

Prove that p(q.rXs)-q(r.sXp)+r(s.pXq)-s(p.qXr)=0

Where p,q,r,s are vectors and X denotes the cross product.

2. Relevant equations

3. The attempt at a solution

So far all I have is this ( I can't get any further after)

q.rXs=r.sXq=s.qXr

r.sXp=p.sXr=s.rXp

s.pXq=q.sXp=p.qXs

p.qXr=r.pXq=q.rXp.

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

Dismiss Notice

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: Dot/cross product proof

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