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A vertical line passing through (a,4) cu...

A vertical line passing through (a,4) cuts the curve `y^2=4ax` at A,B. If the angle subteded by AB at origin is `theta, " then " tan theta`=

A

`pm4/3`

B

`4/3`

C

`-4/3`

D

`pm3/4`

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The correct Answer is:
B
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