Question

Cross product and dot product of two vectors

Answer 1

For cross product you can simply use determinant method as I've done.

Answer 2

Hii I will help you ✌️

=> Given two unit vectors, their cross product has a magnitude of 1 if the two are perpendicular and a magnitude of zero if the two are parallel. The dot product of two unit vectors behaves just oppositely: it is zero when the unit vectors are perpendicular and 1 if the unit vectors are parallel