सिद्ध कीजिए कि `hat(i) (hat(j) xx hat(k) ) + (hat(i) xx hat(k)) . hat(j) = 0 `

hat(i). ( hat(k) xx hat(j)) + hat(j) .(hat(i) xx hat(k) ) + hat(k). ( hat(j) xx hat(i) ) + hat(i). (hat(i) xx hat(j) ) + hat(j) . ( hat(j) xx hat(k) ) =...........

The value of hat(i).(hat(j) xx hat(k))+ hat(j). (hat(i) xxhat(k)) + hat(k) . (hat(i) xx hat(j))

(hat(i) + hat(j) - hat(k)).(hat(i) - hat(j) + hat(k)) =_________

The value of (hat(k) xx hat(j)). hat(i) + hat(j).hat(k) =

(hat(k)xx hat(i)).hat(j)+hat(i).hat(k) …………..