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If the tangent to y^2=4ax at the point (...

If the tangent to `y^2=4ax` at the point `(at^2,2at)`, where `|t|gt1` is a normal to `x^2-y^2=a^2` at the point `(asectheta, a tan theta)`, then

A

`t=-cosec theta`

B

`t=-sec theta`

C

`t=2 tan theta`

D

`t=2 cot theta`

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The correct Answer is:
A
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