Question

If vectors m + s + l = 0, then m x s = s x l

True or false, if true show it if false show an example.


So I put true,

So I have let vectors u//v, defined by u = cv

The angle between n u and v theta = 0 therefore uxv = ||u|| ||v||sin(theta)n = 0, thus rendering
u x v = v x u

so I set up,

m + s = cl
c + s = cl
m + c = cs

where, c = -1

How do I finish this proof?