- #1

ritik.dutta3

- 8

- 0

**If |vector a+vector b|= |vector a- vector b| show that vector a is perpendicular to vector b.**

**A friend of mine suggested me to square both the sides of the equation. At the end, the result was vector a. vector b=0, from which it could be proved that the vectors are perpendicular. But why do we use the dot product and not the cross product?**

Last edited: