Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If AB makes 90 0 angle at the vertex of parabola then-
A
t 1 t 2 = – 1
B
t 1 t 2 = – 4
C
t 1 = 
D
t 2 = – 
Text Solution
Verified by ExpertsThe correct answer is:
B
θ = 90 0 ∴ (slope of OA) (slope of OB) = – 1
2at 1 – 0/at 1 2 – 0 × 2at 2 – 0/at 2 2 – 0 = – 1
2/t 1 × 2/t 2 = – 1
∴ t 1 t 2 = – 4
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