Answer
Graph shown below
Work Step by Step
$sin(t)=x/5$
$cos(t)=y/2$
${x/5}^2+{y/2}^2=sin^2t+cos^2t=1$
${x^2/25}+{y^2/4}=1$

You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.