Question

For a given parabolay2 4ar, two variable chords PQ and RS at right angles are drawn
through the fixed point A(21, yı)inside the parabola, making variable angles 0 and a
respectively with x axis. If ri, T2, T3, rqis the distance of P, Q, R, S from A respectively, then the
value of
+ notais
T1T2
(A) Independent of O
(B) Independent of a
(C) Depends on both O and a
(D)
a constant​

Answer 1

Answer:

For a given parabolay2 4ar, two variable chords PQ and RS at right angles are drawn

through the fixed point A(21, yı)inside the parabola, making variable angles 0 and a

respectively with x axis. If ri, T2, T3, rqis the distance of P, Q, R, S from A respectively, then the

value of

+ notais

T1T2

(A) Independent of O

(B) Independent of a

(C) Depends on both O and a

(D)

a constant