What is the 3-D graph of x^2 +y^2 =z where z=1 and 3-D graph of x^2 +y^2 =1. what is the difference between two of them? - Quora
Prove that x^2 – y^2 = c (x^2 + y^2) is the general solution of differential equation - Sarthaks eConnect | Largest Online Education Community
![Closed trajectory: Cardioid (x 2 + y 2 )(x 2 + y 2 − 2ax) − a 2 y 2 =... | Download Scientific Diagram Closed trajectory: Cardioid (x 2 + y 2 )(x 2 + y 2 − 2ax) − a 2 y 2 =... | Download Scientific Diagram](https://www.researchgate.net/publication/319141519/figure/fig3/AS:528021369360384@1502901512853/Closed-trajectory-Cardioid-x-2-y-2-x-2-y-2-2ax-a-2-y-2-0-a-5.png)