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## Homework Statement

Graph the curve with the parametric equations

x=√(1-0.25cos^2(10t)) * cost

y=√(1-0.25cos^2(10t)) * sint

z=0.5cos10t

explain the appearance of the graph by showing that it lies on a sphere

## Homework Equations

## The Attempt at a Solution

could anyone please just point me in the right direction on how to start this problem? any help would be greatly appreciated! thanks pf!