Question

Polar coordinates of a point are given. Find the rectangular coordinates of the point. (-5, -180°)

Answer 1

\[x = r\cos\theta\]
\[y = r\sin\theta\]
So, (x,y) = (5,0)

Answer 2

\(\large \begin{array}{cccllll}
(&-5, &-180^o)\\
&\uparrow &\uparrow \\
&r&\theta
\end{array}\qquad y=rsin(\theta)\qquad x=rcos(\theta)\)