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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: parabola
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[Post New]9 May 2008 17:32:54 IST
    Subject: parabola
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ganesha1991 (1453)

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show that the tangents at the extremities of any focal chord of a parabola intersect at right angles at the directrix


 


can some one explain me what the question means


what is extremities??????


need not solve the question
    
[Post New]9 May 2008 17:37:18 IST
    Subject: parabola
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sneha.bagri (142)

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extrimities mean d point at whoich the focal cord meets d parabola........
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[Post New]9 May 2008 17:42:15 IST
    Subject: parabola
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ganesha1991 (1453)

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ohho
sorry for posting a simple question like this
when i was reading from my pc i got this doubt sorry
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[Post New]9 May 2008 17:42:27 IST
    Subject: parabola
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ultimator (391)

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A chord is a line joining any 2 points on a curve. Its called a focal cord wen it passes thro focus. The tangent to the curve at these 2 points, when drawn n extended, will meet the directrix at rt. angles.

That is, these tangents n the directrix are concurren n the angle between the 2 tangents is a rt angle.
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[Post New]9 May 2008 17:44:16 IST
    Subject: Re:parabola
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Aatish (2303)

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Re:parabola

............................................................................................................................................................................................
There's Light at the end of every Tunnel, so KEEP MOVING....
Best of luck to all my mates....
............................................................................................................................................................................................
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