Given data:
The given polar coordinate is (9, 5π/3).
The expression for the x- coordinate is,
[tex]\begin{gathered} x=9\cos (\frac{5\pi}{3}) \\ =9\times\frac{1}{2} \\ =4.5 \end{gathered}[/tex]
The expression for the y-coordinate is,
[tex]\begin{gathered} y=9\sin (\frac{5\pi}{3}) \\ =-7.7942 \\ \approx-7.79 \end{gathered}[/tex]
Thus, the caretesian coordinate is (+4.5, -7.79).
