Question

prove that ( I + j ) are not unit vector​

Answer 1

Answer:

unit vector along ( i + j) is ( i + j)/| i + j| |i + j | is magnitude of ( i + j) we know, i and j are perpendicular to each other. So, |i + j| = √(i² + j² + 2.I.j.cos90°

Hence: proved :D