# Vectors

posted by
**Phil**
.

Show that if a, b, c are in V3, then

(a x b) dot [(bxc)x(cxa]) = [a dot (b x c)]^2

I don't know what properties to use

posted by
**Phil**
.

Show that if a, b, c are in V3, then

(a x b) dot [(bxc)x(cxa]) = [a dot (b x c)]^2

I don't know what properties to use