see, it's parameteric in t.

So, we need to differentiate it w.r.t "t".

so, dx/dy = (dx/dt)/(dy/dt).

But are u clear about the thing that w.r.t what you want to integrate it?

means w.r.t. t??

so, first find dx/dy and then perform the integration accordingly w.r.t. the variable you want to do it.

Do post again or nudge me if there's any doubt.