Home > Resources > Homework > Math > Unit Circle

Find the points where the ellipse intersects the empty unit circle

Answer 1

Abigail Nelson

Lucas Brown

To find the points where the ellipse intersects the empty unit circle, we start with the equations of the ellipse and the empty unit circle:

Ellipse: $\x0crac{x^2}{a^2} + \x0crac{y^2}{b^2} = 1$

Empty unit circle: $x^2 + y^2 = 1$

We solve these equations simultaneously. First, we solve the ellipse equation for $x^2$:

$x^2 = a^2(1 – \x0crac{y^2}{b^2})$

Substitute this into the unit circle equation:

$a^2(1 – \x0crac{y^2}{b^2}) + y^2 = 1$

Simplify and solve for $y^2$:

$a^2 – \x0crac{a^2y^2}{b^2} + y^2 = 1$

$\x0crac{y^2(a^2 – b^2)}{b^2} = 1 – a^2$

$y^2 = \x0crac{b^2(1 – a^2)}{a^2 – b^2}$

We then find the corresponding $x$ values using the unit circle equation:

$x^2 = 1 – y^2$

With $y^2 = \x0crac{b^2(1 – a^2)}{a^2 – b^2}$, we find:

$x^2 = 1 – \x0crac{b^2(1 – a^2)}{a^2 – b^2}$

Thus, the points of intersection are solutions to these values of $x$ and $y$.

Answer 2

Alex Thompson

Olivia Lee

To determine where the ellipse intersects the empty unit circle, we use the equations:

Ellipse: $x0crac{x^2}{a^2} + x0crac{y^2}{b^2} = 1$

Empty unit circle: $x^2 + y^2 = 1$

Solve the ellipse equation for $x^2$:

$x^2 = a^2(1 – x0crac{y^2}{b^2})$

Substitute into the circle equation:

$a^2(1 – x0crac{y^2}{b^2}) + y^2 = 1$

Solving for $y^2$:

$y^2 = x0crac{b^2(1 – a^2)}{a^2 – b^2}$

Using $y^2$ in the circle equation:

$x^2 = 1 – y^2$

Thus, the points of intersection are derived from these values.

Answer 3

Amelia Mitchell

Benjamin Clark

To find the intersection points of the ellipse and empty unit circle, use:

Ellipse: $x0crac{x^2}{a^2} + x0crac{y^2}{b^2} = 1$

Circle: $x^2 + y^2 = 1$

Substitute and solve:

$x^2 = a^2(1 – x0crac{y^2}{b^2})$

$a^2(1 – x0crac{y^2}{b^2}) + y^2 = 1$

Find $y^2$ and $x^2$:

$y^2 = x0crac{b^2(1 – a^2)}{a^2 – b^2}$

$x^2 = 1 – y^2$