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Q. If a double ordinate of the parabola y2=4ax is of length 8a , then the triangle formed by double ordinate and line joining vertex with end points of double ordinate is a

NTA AbhyasNTA Abhyas 2022

Solution:

Here, the given parabola y2=4ax , then (a,4a) lies on y2=4ax
Solution
16a2=4aα
α=4a
Slope of OA=4a04a0=1=m1
Slope of OA=4a04a0=1=m2
m1m2=1,OAOA
Hence, OAA is a right angled triangle.