Question

Need help with 11th grade math

Answer 1

`\left(-(3)/(5),(4)/(5) \right)`

Explanation:

We have to find
`n\in\mathbb{N}` such that
`(1-n^2)/(1+n^2) \\eq 0` and
`(2n)/(1+n^2) \\eq 0`.

If we choose
`1\\eq n\in\mathbb{N}`
`\left((1-n^2)/(1+n^2),(2n)/(1+n^2) \right)` is a rational point not on the x-axis or y-axis but on the unit circle.

Let
`n=2`

`\left((1-2^2)/(1+2^2),(2*2)/(1+2^2) \right)`

`\left((1-4)/(1+4),(4)/(1+4) \right)`

`\left(-(3)/(5),(4)/(5) \right)`