Homework Statement
The point A(2,4,5) is reflected in the line with equation r = (0,0,1) + s(4,2,1) , sER, to give the point A'. Determine the co-ordinates of A'.
Homework Equations
1. The equation of the line (parametric equations)
2. A (2,4,5)
Dot Product, and distance from a point...