Show that the four points with position vectors `bara,barb,barc,bard` are coplaner if
`[barb barc bard]+[barc bara bard]+[bara barb bard]=[bara barb barc]`

[bara barb barc]+[bara barc barb] =

Show that [2bara +barb +barc bara +2barb +barc bara +barb +2barc] = 4[bara barb barc]

If bara. barb = barb. barc = barc . bara = 0 then [bara barb barc] =

barc.(barb+barc)xx(bara+barb+barc)=

If bara,barb,barc are non-coplanar vectors, prove that points with position vectors 2bara+3barb-barc,bara-2barb+3barc,3bara+4barb-2barc and bara - 6barb + 6barc are coplanar.

If bara,barc,bard are coplaner then the value of (bard+bara).[baraxx{barbxx(barcxxbard)}]=