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[" If the "x" and "y" co-ordinates of a ...

[" If the "x" and "y" co-ordinates of a point "P" in the "x" -y plane are given by "],[x=(u cos alpha)t,y=(u sin alpha)t-(1)/(2)gt^(2)],[" where "t" a parameter,"g,u" and "alpha" are given constants.Then the locus of the point "P" is a parabola whose "],[" vertex is "]

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