Q. 444.0( 2 Votes )
The line through the points (h,3) and (4,1) intersects line 7x-9y-19=0 at right angle. Find the value of k.
Let A(h,3) and B(4,1) be the given point.
We have, m1=
Now, for 7x-9y-19=0
Using tanθ =
For perpendicular lines 1+m1m2= 0
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