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A lattice point is a point with integer coordinates. How many lattice points \((x,y)\) with \(-100\le x\le 100\) and \(-100\le y\le 100\) are on the graph of the parametric equations \(\begin{align*} x&=30-40\cos t,\\ y&=-50 + 30\cos t? \end{align*}\)

 Nov 6, 2019
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There are 73 lattice points on the graph.

 Nov 6, 2019

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