Hey all, sorry if this is in the wrong section. I'm in a precalc class but we're jumping between trig and this so not really sure anymore. Any help would be appreciated!

a. Eliminate parameter t to find the equation in rectangular form.

Sketch the curve defined by:

So far I made a chart with 3 columns, labeled: t, x, and y. For the t column I chose the values:

Am I supposed to convert? If so, how do I convert ?