Question

Giving that ai +bj 5i-2j are perpendicular find the value of a if b=3​

Answer 1

a =
`(6)/(5)`

Explanation:

Given

ai + bj and 5i - 2j are perpendicular and b = 3, that is

ai + 3j and 5i - 2j are perpendicular, then

The scalar product = 0 , that is

5a - 6 = 0 ( add 6 to both sides )

5a = 6 ( divide both sides by 5 )

a =
`(6)/(5)`