If `bara=2i+3j-k,barb=-i+2j-4k` and `barc=i+j+k`, then `(baraxxbarb).(baraxxbarc)=`

If bara = 2i + 3j - k , barb = - i + 2 j - 4k and barc = i + j + k . then (a xx b) · ( a xx c)

If bara = i + 5k, barb = 2i + 3k, barc = 4i - j + 2k and bard = i-j , then (barc - bara)·(barb xx bard) =

If bara=i+j+k,bara.barb=1 and baraxxbarb=j-k , then : barb =

If bara = i+ 2j - 3k and barb = 3i,- j + 2k , then show that bara+barb and barb-barb are perpendicular to each other.

If veca = 2i+j-k, vecb =-i+2j-4k and vecc=i+j+k , then find (vecaxxvecb).(vecbxxvecc)

if bara=3i+2j+2k,barb=i+2j-2k find bara+barb,bara-barb

If bara,barb,barc are non-coplaner vectors, then (bara.barbxxbarc)/(barcxxbara.barb)+(barb.baraxxbarc)/(barc.baraxxbarb)=

if bara=3i+2j+2k,barb=i+2j-2k find a unit vector perpendicular to both bara+barb,bara-barb

If bara,barb,barc are non-coplaner vectors, then (bara.(barbxxbarc))/(barb.(barcxxbara))+(barb.(baraxxbarc))/(barc.(baraxxbarb))=

If a = 2i + j - 3k, b = I - 2j + k, c -I + j - 4k, d = I + j + k then (a xx b) xx (c xx d) =