Question

if A=4i+6j+3k and B=3i+4j+5k then a. b​

Answer 1

Answer:

51

Explanation:

using the property i.i =j.j = k.k=1

for orthogonal unit vectors

we get

4i×3i + 6j×4j+3k×5k

i.e. 12+24+15

and this will get you answer 51