The position coordinates of a projectile projected from ground on a...

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The position coordinates of a projectile projected from ground on a certain planet (with no atmosphere) are
P given by \( y=\left(4 t-2 t^{2}\right) m \) and \( x=(3 t) \) metre, where \( t \) is in second and point of projection is taken as origin.
The angle of projection of projectile with vertical is
(1) \( 30^{\circ} \)
(2) \( 37^{\circ} \)
(3) \( 45^{\circ} \)
(4) \( 60^{\circ} \)
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