Question

Convert the rectangular equation to polar form.Assume a > 0x=18

Answer 1

To convert a rectangular equation to polar forma, we use

`x=r\cos (\theta),y=r\sin (\theta)`

In the equation x=18, we only have x, so

`\begin{gathered} 18=r\cos (\theta) \\ r=(18)/(\cos(\theta))=18\sec (\theta) \end{gathered}`