How do you eliminate the parameter to find a cartesian equation of the curve?
6,864
Yes, you can use $\cos^2\theta+\sin^2\theta=1$.
First, represent $\cos\theta,\sin\theta$ by $x,y$ respectively. Then, use $\cos^2\theta+\sin^2\theta=1$ to eliminate $\theta$.
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user106039
Updated on August 01, 2022Comments

user106039 about 21 hours
$$x=1/2cosθ$$ $$y=2sinθ$$ $$0 \le θ \le π $$
So I know the parameter that must be eliminated is θ. How should I do this? Are there trig identities that I can use?