Question

Obtain the parametric equation of the following circle.
$4(x^2+y^2)=9$

Answer 1

$x^2+y^2=\frac{9}{4}={\left(\frac{3}{2}\right)}^2$

$x=r\cos \theta ,y=r\sin \theta$

$x=\frac{3}{2}\cos \theta ,y=\frac{3}{2}\sin \theta$