The rectangular equation is composed of variables like x and y which can be graphed on a regular Cartesian plane.
In our case, the coordinate is (0, 5) as:
[tex]\begin{gathered} y=0\times x+5 \\ y=5 \end{gathered}[/tex]Polar equations are used to create interesting curves, and in most cases, they are periodic like sine waves. Usually, they can have the forms:
[tex]x=r\cos\Theta[/tex][tex]y=r\sin(\Theta)[/tex][tex]\tan\Theta=\frac{y}{x}[/tex]Then, in our case r = 1 and θ = 90º. Thus, the equation is:
[tex]y=\sin(90\degree)[/tex]Answer:
[tex]y=\sin(90\operatorname{\degree})[/tex]