Question

eliminate the parameter; x=5cost , y=5sint

Answer 1

What is \(\large x^2=\color{red}?\)

Answer 2

I'm sorry but what do you mean?

Answer 3

To eliminate the parameter means to express these parametric equations in terms of x and y alone, with no parameter t.

Means only one equation.
Now, I'm just asking you, as if only for my information, what is \(\large x^2 = \color{red}?\)

Answer 4

x = 5 cos t
Find x^2.