Question

Find 'a' if P= 3i-2 +4k and Q= a i +2j -
are perpendicular to one anothe
Ans: -​

Answer 1

Answer:

since both are perpendicular

so, P.Q=0

now substitute the value in place of p and q ....

Answer 2

Answer:

3/4

Explanation:

P.Q = (3i-2j +4k) . (a i +2j ) = 3a - 4 = 0 , a = 3/4