Question

A vector = 2 i cap - 3 j cap + 4k cap and B vector= -6 i cap +9 j cap -12 k cap are parallel to each other prove​

Answer 1

Answer:

i j k

2 -3 4

-6 9 -12

I(36-36) - j(-24+24) + k (18-18)

i.0-j.0+k.0

this shows that sin theta = 0

So the angle between two vectors theta = 0

So two vectors are parallel