\[\vec{s}(t)=\left\{ \eqalign{ x(t) &= v_{e}\cos\theta t \\ y(t) &= v_{e}\sin\theta t+\frac{1}{2}gt^2 \\ }\right.\]

\[\Large{\vec{s}(t)=\left\{ \eqalign{ x(t) &= v_{e}\cos\theta t \\ y(t) &= v_{e}\sin\theta t+\frac{1}{2}gt^2 \\ }\right.}\]