Question

two vectors P = 2 i + aj - K and 3i - j - K are perpendicular to each other find the value of a​

Answer 1

5

i hope it helpz you

Answer 2

As the 2 vectors are perpendicular,

Their dot product is zero.

So,

(2i+aj-k).(3i-j-k)=0

So,

6-a+1=0

Therefore,

a=7