ellipse

Consider a circle with its centre at the origin (O), as shown. Two operations are allowed on the circle. Operation 1: Scale independently along the x and y axes. Operation 2: Rotat...

The area of an ellipse represented by an equation $\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1$ is

Solution of the differential equation $$3y{{dy} \over {dx}} + 2x = 0$$ represents a family of