Question

Show that the vectors:
A=3î+j+k and B=î+2j-5k

Answer 1

The given vectors are perpendicular

Explanation:

The given vectors are perpendicular :

to be perpendicular the dot product of the 2 vector must be 0

A . B = 0

in our case

A.B = ( 3*1 + 1*2 + 1*-5 )

    (5-5 )

 = 0

means The given vectors are perpendicular