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  • Mutually perpendicular tangents TA and TB are drawn to ,minimum length

Mutually perpendicular tangents TA and TB are drawn to \mathrm{y^{2}=4 a x},minimum length of AB is equal to

Option: 1

4a


Option: 2

6a


Option: 3

8a


Option: 4

2a


Answers (1)

best_answer

Chord of contact of mutually perpendicular tangents is always a focal chord. Thus minimum length of AB is 4 a.

Posted by

Rishabh

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