Question

Show that the two vectors A = 2i cap + 3j cap and B = 6i cap - 4j cap are mutually perpendicular.​

Answer 1

Answer:

Let

A

=2

i

^

+3

j

^

−4

k

^

and

B

=a

i

^

+b

j

^

+c

k

^

Given

A

and

B

are at right angles.

⇒

A

⋅

B

=0

⇒2a+3b−4c=0

Only option B, satisfies the above relation.

i.e a=4,b=4,c=5

you like this answer plz plz make me brillianlist