Question

show that vectors a= 2icap +3jcap+6kcap, b=3icap-6jcap+2kcap and c=6icap +2jcap-3kcap are mutually perpendicular​

Answer 1

Answer:

if they are mutually perpendicular to each other then abar dot b bar=0

b bar dot c bar=0

and c bar dot a bar =0