If `bara, barb, barc, bard` are any four vectors then `(baraxx barb) xx (barc xx bard)` is a vector

If bara,barb,barc,bard are unit co-planar vectors then abs((baraxxbarb)xx(barcxxbard)) =

If bara, barb, barc, bard, bare are co-planar vectors then {(baraxxbarb)xx(barcxxbard)}xxbare =

If bara, barb, barc are any three vectors then (baraxxbarb)xxbarc is a vector

If bara,barb,barc,bard are four vectors, then show that (baraxxbarb).(barcxxbard)+(barbxxbarc).(baraxxd)+(barcxxbara).(barbxxbard)=0

Let the vectors bara, barb, barc, bard be such that (bara xx barb) xx (barc xx bard) = bar0 . Let pi_(1), pi_(2) be planes determined by the pairs of vectors bara, barb and barc, bard respectively, then angle betwen pi_(1) and pi_(2) is

Given that barc is in the plane of bara, barb and bard is not iri the plane of bara, barb then (baraxx barb) xx (barc xx bard) =

If barb, barc are like unit vectors and baraxx (barbxx barc) = bar0 then

If bara,barb,barc are any three vectors such that (bara+ barb) . barc = (bara - barb) . barc = 0 then (baraxx barb)xxbarc =