Question

Question #3ca54

Answer 1

`y^2=25-10x`

Explanation:

`r=5/(1+cost)`

`r*(1+cost)=5`

`r+rcost=5`

After using `r=sqrt(x^2+y^2)` and `rcost=x` transforms,

`sqrt(x^2+y^2)+x=5`

`sqrt(x^2+y^2)=5-x`

`x^2+y^2=(5-x)^2`

`x^2+y^2=x^2-10x+25`

`y^2=25-10x`