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Consider the curve x=1-3t^(2),y=t-3t^(2)...

Consider the curve `x=1-3t^(2),y=t-3t^(2)`. If tangent at point `(1-3t^(2),t-3t^(2))` inclined at an angle `theta` to the positive x-axis and another tangent at P(2,-3) cuts the cuve again at Q.
The angle between the tangent at P and Q will be-

A

`(pi)/(4)`

B

`(pi)/(6)`

C

`(pi)/(2)`

D

`(pi)/(3)`

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