Choose the correct answer The value of ^i.(^j×^k)+^j.(^k×^i)+^k(^i×^j) is a) Zero b) - 1 c) 1 d) 3
We have ^i.(^j×^k)+^j.(^k×^i)+^k(^i×^i)=^i.^i+^j.^j+^k.^k [∵^j×^k=^i,^k×^i=^j,^i×^j=^k] =1+1+1=3 [∵^i.^i=^j.^j=^k.^k=1]