I have the following curve:
$x^4=a^2(x^2-y^2)$
Prove that the area of its loop is $\frac{2a^2}{3}$.
My approach
This curve has four loops. So the required area should be:
$4\int_{0}^{a}\frac{x}{a}\sqrt{a^2-x^2} dx$
But, After solving, the area turned out to be $\frac{4a^2}{3}$. What am I doing wrong here?
Thanks
Best Answer
Your derivation seems correct, maybe the original question is simply asking for the area of one loop that is precisely
$$2\int_{0}^{a}\frac{x}{a}\sqrt{a^2-x^2} dx=\frac{2a^2}{3}$$