The lines joining the origin to the point of intersection of the line lx+my=1 and y²=4ax are at right angles. Show that 4al=1

Trigonometry (MindTap Course List)
8th Edition
ISBN:9781305652224
Author:Charles P. McKeague, Mark D. Turner
Publisher:Charles P. McKeague, Mark D. Turner
Chapter1: The Six Trigonometric Functions
Section1.2: The Rectangular Coordinate System
Problem 60PS
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The lines joining the origin to the point of intersection of the line lx+my=1 and y²=4ax are at right angles. Show that 4al=1

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