A point P in has coordinate vector . Find the coordinate vector of the point Q which is the reflection of P in the line which passes through the point parallel to the direction
A point P in has coordinate vector . Find the coordinate vector of the point Q which is the reflection of P in the line which passes through the point parallel to the direction
I'm not certain if this will help:
1. Draw a sketch.
2. Since Q is the image of P by refelection about the line l the midpoint of belongs to the line l and the vector is perpendicular to . That means: