Question

Which equation will produce the graph shown? O A. r = 2 cose O B. 0-1 9 2 OC. = 2 y = O D. cose = 2

Answer 1

D.

`r\cos \theta=2`

Explanation:

We have a graph that is a vertical on a polar coordinate plane.

That is, the equation would be:

`\begin{gathered} x=\text{ constant} \\ \text{ in this case:} \\ x=2 \end{gathered}`

We know that the value of x, in polar coordinates, is as follows:

`\begin{gathered} x=r\cdot\cos \theta \\ \text{ therefore:} \\ r\cos \theta=2 \end{gathered}`