A ray of light passing through the point 
reflects on the 
-axis at point 
and the reflected ray passes through the point 
. Let 
be the point that divides the line segment 
internally into the ratio 
. Let the co-ordinates of the foot of the perpendicular 
from 
on the bisector of the angle PAQ be 
. Then, the value of 
is equal to
Text Solution
Verified by Experts31
(31)
By observation we see that 
.
And 
-cordinate of 
Now 
is image of 
in 
which will be 
Equation of 
is 
i.e. 
by solving with 
By (1), (2)
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