Question

If vector a is perpendicular to vector b and vector c then prove that a×(b×c)=0

Answer 1

given that vector a is perpendicular to vector b and vector c
then a×b=c; or a×c=b; or b×c=a
a×(b×c)= a×a= mod (a).mod (a).sin0=0
hope you would understand. ..