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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
If a chord which is normal to the parabola $y^2=4ax$ at one end subtends a right angle at the vertex, then its slope is
Solution
For parabola $y^2=4ax$, slope of normal at parameter $t$ is $-t$.
Let slope of chord be $m=-t$.
Since the chord subtends a right angle at the vertex,
$m^2=2$
So,
$m=\sqrt2$
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