Question

25xy=225 convert to polar form

Answer 1

$\bf x=rcos(\theta)\qquad \qquad y=rsin(\theta)\\\\ -----------------------------\\\\ 25xy=225\implies xy=\cfrac{225}{25}\implies xy=9 \\\\\\ rcos(\theta)\cdot rsin(\theta)=9\impliedby \textit{common factor} \\\\\\ r[cos(\theta)sin(\theta)]=9\implies r=\cfrac{9}{cos(\theta)sin(\theta)}$