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# A ray of light coming from the point (1,2) is reflected at a point A on the x-axis and then passes through the point (5,3). What are the co-ordinates of point A?

Arun Kumar IIT Delhi
7 years ago
Hello Student,
$\\ \\ tan(\theta)={2 \over 1-x} \\tan(\pi -\theta)={3 \over 5-x}=-tan(\theta)=-{2 \over 1-x} \\3x-3=5-x \\=>4x=8 \\=>x=2 \\$
Thanks & Regards
Arun Kumar
Btech, IIT Delhi